Read Genesis 13:11 Using Other Translations
Then Lot chose him all the plain of Jordan; and Lot journeyed east: and they separated themselves the one from the other.
So Lot chose for himself all the Jordan Valley, and Lot journeyed east. Thus they separated from each other.
Lot chose for himself the whole Jordan Valley to the east of them. He went there with his flocks and servants and parted company with his uncle Abram.