Genesis 21:22-23

22About this time, Abimelech came with Phicol, his army commander, to visit Abraham. “God is obviously with you, helping you in everything you do,” Abimelech said.

23“Swear to me in God’s name that you will never deceive me, my children, or any of my descendants. I have been loyal to you, so now swear that you will be loyal to me and to this country where you are living as a foreigner.”