Genesis 21:25-32

25And Abraham reproved Abimelech because of a well of water that Abimelech's servants had violently taken away.

26And Abimelech said, I do not know who has done this, neither hast thou told me [of it], neither have I heard [of it] but to-day.

27And Abraham took sheep and oxen, and gave them to Abimelech; and both of them made a covenant.

28And Abraham set seven ewe-lambs of the flock by themselves.

29And Abimelech said to Abraham, What [mean] these seven ewe-lambs, these which thou hast set by themselves?

30And he said, That thou take the seven ewe-lambs of my hand, that they may be a witness to me that I have dug this well.

31Therefore he called that place Beer-sheba, because there they had sworn, both of them.

32And they made a covenant at Beer-sheba. And Abimelech rose up, and Phichol the captain of his host, and returned into the land of the Philistines.