John Trapp on Proverbs 25:22-23

Verſ. 22. For thou ſhalt heap coals of fire] By heaping courteſies upon him, thou ſhalt win him over to thy ſelf: as the King of Iſrael did thoſe Syrians hee feaſted. They came no more after that by way of ambuſh or incurſion into the bounds of Iſrael. In doing ſome good to our enemies, wee doe moſt to our ſelves.

And the Lord ſhall reward thee] However men deal with thee. It may bee they may prove droſs that will not bee melted, dirt that will not bee mollified, but moulter to nothing, crumble to crattle as ſtones, &c. as having no metal of ingenuity or good nature in them. But deſiſt not, deſpond not, God will reward thee, and his retributions are more than bountiful. Or (as the words may be read) God will pacifie for thee, as he did Saul for David. Never did a charitable act goe away without a bleſſing: God cannot but love in us this imitation of his mercy, who bids his Sun to ſhine upon the evil and unthankful: and that love is never fruitleſs.

Caecias nubes attrahit.Verſ. 23. The North-wind drives away raine] Hence Homer calls it [non-Latin text not transcribed], the fair-weather-maker, and Hierom, the ayres Beeſome. There is a Southerly wind, that attracts clouds, and ingenders rain.

So doth an angry countenance, a back-biting tongue] The ready way to be rid of Tale-bearers, is to brow-beat them: for like Whelps, if we ſtroke them, they leap upon us and defile us with fawning; but give them a rap, and they are gone: ſo here. Carry therefore in this caſe a ſevere rebuke in thy countenance, as God doth, Pſal. 80.16. Be not a re-ſetter to theſe privie Theeves, a receptacle for theſe mures nominis, as one calls them: the Tale-hearer is as blame-worthy as the Tale-bearer, and he that loves a lye, as he that makes it. Revel. 22. See Pſal. 15.3. Rom. 1.31.