Matthew 5:44
But I say to you, love your enemies and pray for those who persecute you,
Matthew 6:14
For if you forgive men their trespasses, your heavenly Father will also forgive you.
Romans 12:20-21
No, "if your enemy is hungry, feed him; if he is thirsty, give him drink; for in so doing you will heap burning coals on his head."
1 Thessalonians 5:15
See that none of you repays evil for evil, but always seek to do good to one another and to all.
1 Peter 3:9
Do not return evil for evil or insult for insult, but give a blessing instead; for to this you were called, that you may inherit a blessing.