Genesis 21:32-36

So they made a covenant at Beersheba; and Abimelech and Phicol, the commander of his army, got up and returned to the land of the Philistines.

Abraham planted a tamarisk tree at Beersheba, and there he called on the name of the Lord, the Everlasting God.

And Abraham resided in the land of the Philistines for many days.