Is there a Mongolian (or Tengrist) ritual of throwing water in front of someone before they set off on a journey? Or is that just a Turkish thing?
As a Mongolian, the first thing to come to mind is, spraying milk right after someone special such as a family member leaves. For book sources. I believe it was described by Jack Weatherford in "Genghis Khan and the Making of the Modern World" or "The secret history of Mongol Queens". I find this interesting as "suu" means milk in Mongolian and water in Turkish, if I'm not mistaken.