Proverbs 25: 21 - 22

²¹If thine enemy be hungry, give him bread to eat; and if he be thirsty, give him water to drink:
²²For thou shalt heap coals of fire upon his head, and the LORD shall reward thee.

1 Samuel 24: 16 - 19

¹⁶And it came to pass, when David had made an end of speaking these words unto Saul, that Saul said, Is this thy voice, my son David? And Saul lifted up his voice, and wept.
¹⁷And he said to David, Thou art more righteous than I: for thou hast rewarded me good, whereas I have rewarded thee evil.
¹⁸And thou hast showed this day how that thou hast dealt well with me: forasmuch as when the LORD had delivered me into thine hand, thou killedst me not.
¹⁹For if a man find his enemy, will he let him go well away? wherefore the LORD reward thee good for that thou hast done unto me this day.

Proverbs 24: 17

¹⁷Rejoice not when thine enemy falleth, and let not thine heart be glad when he stumbleth:

Luke 6: 27 - 31

²⁷But I say unto you which hear, Love your enemies, do good to them which hate you,
²⁸Bless them that curse you, and pray for them which despitefully use you.
²⁹And unto him that smiteth thee on the one cheek offer also the other; and him that taketh away thy cloak forbid not to take thy coat also.
³⁰Give to every man that asketh of thee; and of him that taketh away thy goods ask them not again.
³¹And as ye would that men should do to you, do ye also to them likewise.

Matthew 5: 43 - 46

⁴³Ye have heard that it hath been said, Thou shalt love thy neighbour, and hate thine enemy.
⁴⁴But I say unto you, Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you;
⁴⁵That ye may be the children of your Father which is in heaven: for he maketh his sun to rise on the evil and on the good, and sendeth rain on the just and on the unjust.
⁴⁶For if ye love them which love you, what reward have ye? do not even the publicans the same?

Romans 12: 17 - 21

¹⁷Recompense to no man evil for evil. Provide things honest in the sight of all men.
¹⁸If it be possible, as much as lieth in you, live peaceably with all men.
¹⁹Dearly beloved, avenge not yourselves, but rather give place unto wrath: for it is written, Vengeance is mine; I will repay, saith the Lord.
²⁰Therefore if thine enemy hunger, feed him; if he thirst, give him drink: for in so doing thou shalt heap coals of fire on his head.
²¹Be not overcome of evil, but overcome evil with good.