Genesis 26:16-18

16Then Abimelek said to Isaac, “Move away from us; you have become too powerful for us.” 17So Isaac moved away from there and encamped in the Valley of Gerar, where he settled.

18Isaac reopened the wells that had been dug in the time of his father Abraham, which the Philistines had stopped up after Abraham died, and he gave them the same names his father had given them.