Genesis 21:30
The Message Bible (MSG)Abraham said, “It means that when you accept these seven sheep, you take it as proof that I dug this well, that it’s my well.”
31-32 That’s how the place got named Beersheba (the Oath-Well), because the two of them swore a covenant oath there. After they had made the covenant at Beersheba, Abimelech and his commander, Phicol, left and went back to Philistine territory.
33-34 Abraham planted a tamarisk tree in Beersheba and worshiped God there, praying to the Eternal God. Abraham lived in Philistine country for a long time.