"This is the way to kill a wife with kindess"
Shakespeare, Taming of the Shrew
If thine enemy be hungry, give him bread to eat; and if he be thirsty, give him water to drink:  For thou shalt heap coals of fire upon his head, and the Lord shall reward thee.
Dearly beloved, avenge not yourselves, but rather give place unto wrath: for it is written, Vengeance is mine; I will repay, saith the Lord.  Therefore 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.  Be not overcome of evil, but overcome evil with good.