Genesis 13:8-11

8So Abram said to Lot, “Please let there be no strife and disagreement between you and me, nor between your herdsmen and my herdsmen, because we are relatives.

9Is not the entire land before you? Please separate [yourself] from me. If you take the left, then I will go to the right; or if you choose the right, then I will go to the left.”

10So Lot looked and saw that the valley of the Jordan was well watered everywhere—this was before the Lord destroyed Sodom and Gomorrah; [it was all] like the garden of the Lord, like the land of Egypt, as you go to Zoar [at the south end of the Dead Sea].

11Then Lot chose for himself all the valley of the Jordan, and he traveled east. So they separated from each other.