Genesis 13:7-9

7And there was strife and quarreling between the herdsmen of Abram’s cattle and the herdsmen of Lot’s cattle. Now the Canaanite and the Perizzite were living in the land at that same time [making grazing of the livestock difficult].

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.”