John Gill Commentary Proverbs 25:22

"For thou wilt heap coals of fire upon his head, And Jehovah will reward thee." — Proverbs 25:22 (ASV)

For you shall heap coals of fire upon his head. Not to increase his punishment and damnation, the more aggravated by kindness shown him; but to bring him by such means to a sense of former injuries, and to shame for them, repentance of them, and love of the person injured, and carefulness for the future of doing him any further wrong;

and the Lord shall reward you: with good things, for all the good done to your enemy, whether it has the desired effect on him or not; or whether he rewards you or not; see (Romans 12:20Romans 12:21) .