משלי כה:כב פירוש: רש״י

for...coals they are to him, that you are scooping from the fire to heap upon his head.

scooping Heb. חותה. Any scooping of coals from a fire is called חותה, as it is stated (Isa. 30:14): “to scoop (לחתות) fire from a hearth.”

will reward you Heb. ישלם לך, will cause him to make peace with you, that he should not overpower you.