Genesis 26:14-17

14He had many sheep, goats and cows. He also had many servants in his house. He had so many servants that the Philistines became jealous of him.

15So they took dirt from the ground and they filled up Isaac's wells. When Abraham was alive, his servants had dug these wells to get water.

16Abimelech said to Isaac ‘You have become too powerful for us. Go and live somewhere else.’

17So Isaac moved away from that place. He put his tents in the Valley of Gerar and he stayed there.