Bereshis 14:22-23

And Avram said to the Melech Sodom, I have lifted up mine hand unto HASHEM, El Elyon Possessor of Shomayim va'Aretz, That I will not take from a thread even to the thong of a sandal, and that I will not take any thing that is thine, lest thou shouldest say, I have made Avram rich