Wherefore he called that place Beersheba; because there they sware both of them.
Abraham and Abimelech establish a covenant at a well in the Negev.
Genesis 21:31
King James Version (public domain)
Traditionally attributed to Moses · c. 13th century BC · The Pentateuch — Genesis, Exodus, Leviticus, Numbers, and Deuteronomy — is traditionally attributed to him
Context
29And Abimelech said unto Abraham, What mean these seven ewe lambs which thou hast set by themselves?
30And he said, For these seven ewe lambs shalt thou take of my hand, that they may be a witness unto me, that I have digged this well.
31Wherefore he called that place Beersheba; because there they sware both of them.
32Thus they made a covenant at Beersheba: then Abimelech rose up, and Phichol the chief captain of his host, and they returned into the land of the Philistines.
33And Abraham planted a grove in Beersheba, and called there on the name of the LORD, the everlasting God.