The OT Prophet Isaiah lived in the 8th-century BC. Cyrus, the Emperor of Persia, lived well over one hundred years later: Cyrus (580-529 BC) was the first Achaemenid Emperor. Yet The Book of Isaiah in Chapters 44 and 45 speaks of Cyrus in no uncertain terms:
Who is saying of Cyrus, My shepherd, And all my delight He doth perfect, So as to say of Jerusalem, Thou art built, And of the temple, Thou art founded.
Thus said Jehovah, To His anointed, to Cyrus, Whose right hand I have laid hold on, To subdue nations before him, Yea, loins of kings I loose, To open before him two-leaved doors, Yea, gates are not shut:
If this is so, it's a miracle.
However, it is possible that the book of Isaiah is simply written after the event and written in a way that make it look as if it could predict prophecy. How do we know which one is right?
Note: I used Young Literal Translation because it transliterate YHWH into Yehovah where all other translation seems to take more "liberty". To me, it's much less confusing.
If there are significant differences that may change the meaning, I'll consider all translations.
Note2: In Christian world, this sort of "I told you so" fulfillment lead to disputes of when a text is actually written. For example, Christian gospel "may" have predicted fall of Jerusalem before 70 AD. This causes a dispute over when the Gospel was actually written. See: Who says Jesus couldnt predict the fall of Jerusalem