Genesis 14:13

14:13 A fugitive came and told Abram the Hebrew. Now Abram was living by the oaks of Mamre the Amorite, the brother of Eshcol and Aner. (All these were allied by treaty with Abram.)

Romans 12:18

12:18 If possible, so far as it depends on you, live peaceably with all people.

Hebrews 6:16

6:16 For people swear by something greater than themselves, and the oath serves as a confirmation to end all dispute.