Genesis 21:22-23

22And it came to pass at that time that Abimelech, and Phichol the captain of his host, spoke to Abraham, saying, 1God is with thee in all that thou doest.

23And now swear to me here by 2God that thou wilt not deal deceitfully with me, nor with my son, nor with my grandson. According to the kindness that I have done to thee, thou shalt do to me, and to the land in which thou sojournest.