Genesis 21:30

27 And Abraham taketh sheep and oxen, and giveth to Abimelech, and they make, both of them, a covenant;

28 and Abraham setteth seven Lambs of the flock by themselves.

29 And Abimelech saith unto Abraham, `What [are] they -- these seven lambs which thou hast set by themselves?`

30 And he saith, `For -- the seven lambs thou dost accept from my hand, so that it becometh a witness for me that I have digged this well;`

31 therefore hath he called that place `Beer-Sheba,` for there have both of them sworn.

32 And they make a covenant in Beer-Sheba, and Abimelech riseth -- Phichol also, head of his host -- and they turn back unto the land of the Philistines;

33 and [Abraham] planteth a tamarask in Beer-Sheba, and preacheth there in the name of Jehovah, God age-during;