Genesis 21:31-34

31Wherefore he called that place Beer–sheba; because there they sware both of them.1 32Thus they made a covenant at Beer–sheba: then Abimelech rose up, and Phichol the chief captain of his army, and they returned into the land of the Philistines.

33And Abraham planted a grove in Beer–sheba, and called there on the name of Yhwh, the everlasting God.2 34And Abraham sojourned in the Philistines’ land many days.