17 Do not pay anyone back with evil for evil. See that you are above reproach in the eyes of everyone.
18 If possible, for your part, live peaceably with everybody.
19 Do not take your revenge, dear friends, but leave room for God's anger, for the Scripture says, "Vengeance belongs to me; I will pay them back, says the Lord."
20 No! If your enemy is hungry, feed him! If he is thirsty, give him something to drink! For if you do, you will heap burning coals upon his head!
21 Do not be conquered by evil, but conquer evil with good.
Bible verses about "contracts" | Goodspeed
Romans 12:17-21
Hebrews 6:16
16 For men make oath by something greater than themselves, and they accept an oath as settling finally any disagreement they may have.
Colossians 3:9-10
Matthew 5:37
37 But your way of speaking must be 'Yes' or 'No.' Anything that goes beyond that comes from the evil one.
Colossians 2:14
14 canceled the bond which stood against us, with its requirements, and put it out of our way when he nailed it to the cross.
Hebrews 6:17
17 Therefore, God in his desire to make it perfectly clear to those to whom he made his promise, that his purpose was unalterable, bound himself with an oath,
Galatians 3:15
15 To take an illustration, brothers, from daily life: even a human agreement, once ratified, no one annuls or alters.