Genesis

²⁹And Abimelech said to Abraham, What do these seven ewe lambs which you have set apart mean? ³⁰He said, You are to accept these seven ewe lambs from me as a witness for me that I dug this well. ³¹Therefore that place was called Beersheba [well of the oath], because there both parties swore an oath. ³²Thus they made a covenant at Beersheba; then Abimelech and Phicol the commander of his army returned to the land of the Philistines. ³³Abraham planted a tamarisk tree in Beersheba and called there on the name of the Lord, the Eternal God. ³⁴And Abraham sojourned in Philistia many days.