Genesis 21:32

21:32 So they made a treaty at Beer Sheba. Then Abimelech and Phicol, the commander of his army, returned to the land of the Philistines.

Genesis 26:1

Isaac and Abimelech

26:1 There was a famine in the land, subsequent to the earlier famine that occurred in the days of Abraham. Isaac went to Abimelech king of the Philistines at Gerar.

Genesis 26:15

26:15 So the Philistines took dirt and filled up all the wells that his father’s servants had dug back in the days of his father Abraham.