Genesis 21:22-23

22And it came to pass at that time, that Abimelech and Phichol the chief captain of his host spoke to Abraham, saying, God is with thee in all that thou doest: 23Now therefore swear to 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 to thee, thou shalt do to me, and to the land in which thou hast sojourned.1