Genesis 26:14-17

14He had so many flocks and herds and servants that the Philistines envied him.

15So all the wells that his father’s servants had dug in the time of his father Abraham, the Philistines stopped up, filling them with earth.

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.