And Abraham said, I will swear.
Genesis 14:13
And there came one that had escaped, and told Abram the Hebrew; for he dwelt in the plain of Mamre the Amorite, brother of Eshcol, and brother of Aner: and these were confederate with Abram.
Romans 12:18
If it be possible, as much as lieth in you, live peaceably with all men.
Hebrews 6:16
For men verily swear by the greater: and an oath for confirmation is to them an end of all strife.