Genesis 21:22-24

Now at that time Abimelech and Phicol, the commander of his army, said to Abraham, “God is with you in everything you do; so now, swear to me here by God that you will not deal unfairly with me [by breaking any agreements we have] or with my son or with my descendants, but as I have treated you with kindness, you shall do the same to me and to the land in which you have sojourned (temporarily lived).” And Abraham said, “I will swear.”