"In those ancient days, when the good destinies had been decreed, and after An and Enlil had set up the divine rules of heaven and earth, then ... Enki, the master of destinies, ... founded dwelling places; he took in his hand waters to encourage and create good seed; he laid out side by side the Tigris and the Euphrates, and caused them to bring water from the mountains; he scoured out the smaller streams, and positioned the other watercourses."
January 1, 1970
https://en.wikiquote.org/wiki/Tigris%E2%80%93Euphrates_river_system