Genesis 21:25 (KJV)

And God was with the lad; and he grew, and dwelt in the wilderness, and became an archer.

And he dwelt in the wilderness of Paran: and his mother took him a wife out of the land of Egypt.

And it came to pass at that time, that Abimelech and Phichol the chief captain of his host spake unto Abraham, saying, God is with thee in all that thou doest:

Now therefore swear unto me here by God that thou wilt not deal falsely with me, nor with my son, nor with my son's son: but according to the kindness that I have done unto thee, thou shalt do unto me, and to the land wherein thou hast sojourned.

And Abraham said, I will swear.

And Abimelech said, I wot not who hath done this thing; neither didst thou tell me, neither yet heard I of it, but to day.

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

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

And Abimelech said unto Abraham, What mean these seven ewe lambs which thou hast set by themselves?

And 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.