24 And Abraham said, I swear.
Genesis 21:24 Cross References - Thomson
Genesis 14:13
13 And one of them who escaped, came and told Abram, the traveller, who then dwelt near the oak grove of Mambre the Amorite, the brother of Eschol, and the brother of Aunan, who were in alliance with Abram.
Romans 12:18
18 If possible, that is, as far as in your power, be at peace with all men.
Hebrews 6:16
16 For men indeed swear by a greater, and an oath for confirmation being to them an end of strife,