The second law of the Code of Hammurabi states:

2 If any one bring an accusation against a man, and the accused go to the river and leap into the river, if he sink in the river his accuser shall take possession of his house. But if the river prove that the accused is not guilty, and he escape unhurt, then he who had brought the accusation shall be put to death, while he who leaped into the river shall take possession of the house that had belonged to his accuser.

Why was jumping into the river a valid way to solve a dispute? Was it a specific river?

(Being Mesopotamia surely brings two specific rivers to mind)

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    What have you researched on this so far? Doesn't for example the WP entry on Trial by ordeal answer your question? Commented Sep 8, 2019 at 12:40
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    @LangLangC only superficially as all WP articles these days do. It is like sipping the Lamen broth and taking it for the meal. That is why we came to the expert site and ask our betters. I did read some articles and even the code itself but googling these days is almost as good as the former example. Commented Sep 8, 2019 at 14:59
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    So the man who can afford to fatten himself fares better in law. That's dumb.
    – Joshua
    Commented Sep 8, 2019 at 21:43
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    That's an... interesting translation of the law that you've quoted. Here's one I'd consider more accurate, originally from Roth's Law Collections from Mesopotamia and Asia Minor (1995). (I have a hardcopy of Roth's translation, but AFAIK the whole text isn't freely available online.) For that matter, I checked the translations of a few other laws on the page you linked, and they all seem rather unconventional. For example, in law #1, they seem to translate nērtu as "ban"; all the dictionaries I've checked say it means "murder". Commented Sep 8, 2019 at 23:36
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    Ps. Here's a link to Harper's translation from 1904, now in the public domain. While over 100 years old, AFAIK it's still regarded as basically correct in most respects; many of the differences between Harper's and Roth's translations can be attributed to ambiguities in the original text and/or to different choices in mapping Babylonian grammar and idioms to English. Commented Sep 8, 2019 at 23:44

2 Answers 2


It was a divine judgement in cases where the evidence was inconclusive and previous attempts to resolve the case had failed. In some cases at least, it was only used after other attempts at a resolution had failed.

We can't be certain why it was considered a valid outcome as there is insufficient evidence, but it is likely that the apparent verdict of a god would have been convincing evidence for believers.

The law referred to in the question is not the only mention of a river ordeal in ancient Mesopotamian law codes. The Code of Hammurabi itself later on refers to this ordeal in cases of suspected adultery (see No. 132). Also, the earlier (c. 2100–2050 BC) Code of Ur-Nammu (No.14) similarly mentions the river ordeal for adultery.

The ordeal was not so much a means of giving evidence as a referral of the issue to a higher court — that of the gods. Clear examples are found only in Mesopotamia and Anatolia, where it took the form of a river ordeal, the river being conceived of as a divinity. The trial could involve one or both parties. The mechanics are not well documented, but it seems that ordeals were carefully monitored and could involve swimming or carrying an object in water a certain distance. At Mari, the use of substitutes for the parties is attested. Drowning indicated guilt, but the unsuccessful subject could be rescued prior thereto and punished. The issue need not be criminal; already in the third millennium, disputes over property could be settled by ordeal.

Source: Raymon Westbrook (ed), 'A History of Ancient Near Eastern Law' (2003) p.34

According to Bertrand Lafont and Raymond Westbrook in Westbrook (ed), the river ordeal was, in at least some cases, a last resort once other means had been exhausted. After a claim against another person had been made, a request could be made by either party to have access to a court. These included an investigation report, declarations by the parties concerned, and the weighing of evidence and statements.

...The judgment may be a direct decision closing the case ... in favor of one party. It may also be a decision depending on further proof. This can be realized by a declaratory oath ... of one of the parties or of one or more witnesses to the fact or to the original transaction...

An alternative to the oath is the river ordeal. It seems to have been practiced quite frequently, as a large list with seventeen short protocols of ordeals and another fragmentary tablet, both from Nippur, show....Most disputes are over fields, some over silver, barley, oxen, and sheep; one is about a slave...

The river ordeal was also used in cases of witchcraft and adultery in the Neo-Sumerian period. In one case concerning a princess, a substitute was used. The best evidence we have on river ordeals comes from Mari in modern-day Syria. Citing J.-M. Durand, Westbrook notes

the procedure there involved swimming a set distance, perhaps with some handicap, such as carrying a millstone or swimming underwater. Prior to entering the water, the swimmer reiterated the claim at issue, sometimes in answer to a series of interrogatories (ARM 26/1 249, 253). The use of substitutes was possible: townspeople swim for their prince (ARM 26/1 249), a lady-in-waiting for her queen (249), a wife for her husband (254), a mother for her daughter (253). If the swimmer failed to complete the course and a fortiori if he drowned, his case was lost, by divine judgment.

According to Westbrook,

The reasons for using the ordeal are unclear. It had the advantage of giving an immediate divine judgment, whereas with the oath, divine punishment would have to be awaited. It may also have been the last resort when all other attempts to ascertain the truth had failed. In CT 29 42–43, after the plaintiff had twice rejected a judgment based on the oath, the king sent the parties to “the river god, the judge of truth.”

Worth noting is that

the ordeal was undergone freely and voluntarily (e.g., MDP 23 242:1–5 ina †ubàti“u ina nar"amàti“u), but it could still have been ordered by the court. The subject could refuse to undergo the ordeal, thereby losing the case.

Thus, the subject's faith was being tested and, undoubtedly, the ordeal was open to manipulation (see Betterthan Kwora's answer for more on this). Whether or not the ordeal was most likely to be undertaken by the innocent, and the outcome manipulated on that basis, we can't say for the time of Hammurabi. Unlike some of the medieval evidence (which shows most trials by ordeal resulted in a 'not guilty' verdict), we do not have enough evidence on verdicts for ancient Mesopotamia. We know that some were found 'not guilty' (the aforementioned princess again) while others were not (there are records of people who failed, some of whom were fished out of the river to be punished).

Whether women undertaking the river ordeal after being accused of adultery were more likely to be guilty or innocent in the first place is a matter of some debate. Siaw Fung Chong, in Innocence by Ordeal or Ordeal By Innocence? observes that, in the ancient Near East,

women facing accusations from their husbands or from the man folks of their communities—even when there is no evidence—may find it challenging to defend themselves.

A guilty woman might have little to lose as, in the Code of Ur-Nammu, at least, she would be killed if guilty; the river ordeal could be her only chance of survival.

Allowing the use of substitutes, at first glance, may seem to negate the aspect of faith being tested. However, if someone was able to find to find a substitute (or lots of substitutes in the case of "townspeople swim for their prince") willing to undergo the ordeal on their behalf, it could be seen as a public statement of belief by a third party in the subject's innocence (though whether the aforementioned princess' substitute had much choice is of course debatable).

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    Sounds like knowing how to find swim was an important skill!
    – C Monsour
    Commented Sep 8, 2019 at 16:01
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    @CMonsour as is the case for most people living near serious bodies of water, especially if fishing is an important source of food and boats for trade and travel.
    – jwenting
    Commented Sep 9, 2019 at 4:48

Peter Leeson from George Mason University has argued that medieval trial by ordeal worked because people believed that they worked. Thus, only the innocent were willing to undergo the ordeal. If this theory is correct, presumably the ordeal also separated the guilty and innocent via the same mechanism at the time of Hammurabi.

I argue that medieval judicial ordeals accurately assigned accused criminals’ guilt and innocence. They did this by leveraging a medieval superstition called iudicium Dei (judgments of God). According to that superstition, God condemned the guilty and exonerated the innocent through clergy-conducted physical tests. Medieval citizens’ belief in iudicium Dei created a separating equilibrium in which only innocent defendants were willing to undergo ordeals. Conditional on observing a defendant’s willingness to do so, the administering priest knew he or she was innocent and manipulated the ordeal to find this. My theory explains the peculiar puzzle of ordeals: trials of fire and water that should have condemned most persons who underwent them did the reverse. They exonerated these persons instead. Boiling water rarely boiled persons who plunged their arms in it. Burning iron rarely burned persons who carried it. Ordeal outcomes were miraculous, but they were miracles of mechanism design.

Source: Leeson, Peter T. "Ordeals." The Journal of Law and Economics 55, no. 3 (2012): 691-714.

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    And similarly, people would be less willing to accuse someone if there was a chance they might lose their own possession as a result of the trial (whether decided by gods or good fortune) Commented Sep 9, 2019 at 7:09
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    This is fairly convincing for the middle ages because there is evidence. For earlier, it's a theory and maybe true or maybe not.
    – bonzo-lz
    Commented Sep 9, 2019 at 10:28
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    @michalpaszkiewicz As in the case of mesopotamia, when it came to the river trial, the law explicitly stated that the "winner" took over the loser's house. Commented Sep 9, 2019 at 12:12
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    This is based on an entirely false assumption though - namely that the administering priest cared about guilt or innocence. These tests would be imposed on a person after accusation by an authority, whether religious or not. Failure of the test would diminish the authority figure, so the authority figures ensured the tests were such that they could not give any other outcome than to "prove" the person guilty. Ordeal survival was therefore due either to miraculous pain tolerance, or (more likely) due to miraculous incompetence in administering the test.
    – Graham
    Commented Sep 9, 2019 at 16:13
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    @DrMcCleod There are stats from medieval times which clearly show a high acquittal rate, though some samples are quite small. Leeson cites a couple in his article. While there is some data to support his theory, Leeson's article is specifically about medieval trial by ordeal. He makes no reference or claims about Mesopotamia. The closest medieval ordeal to the ancient river ordeal would be dunking in cold water (floating = guilty), which was mostly used for men (according to his data). Also, there is no available evidence to suggest a high acquittal rate in river ordeals in Mesopotamia. Commented Sep 11, 2019 at 0:41

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