Solomon
Proverbs 26:21ESV·traditional attribution

As charcoal to hot embers and wood to fire, so is a quarrelsome man for kindling strife.

Matthew Henry Presbyterian @wholebiblehenry

Contention is as a fire; it heats the spirit, burns up all that is good, and puts families and societies into a flame. Now here we are told how that fire is commonly kindled and kept burning, that we may avoid the occasions of strife and so prevent the mischievous consequences of it. If then we would keep the peace, 1.

Commenting on Proverbs 26:20-22

John Gill Reformed Baptist @doctorgill

As coals are to burning coals, and wood to fire,.... As brands, wood half burnt, or dead coals put to live and burning ones, soon take fire and become like them, and fit and proper fuel for them, and add to their heat: so is a contentious man to kindle strife; or "a man of contentions" (k); who is given to it, is full of...

Keil & Delitzsch Lutheran @keilanddelitzsch

Pro 26:21 21 Black coal to burning coal, and wood to fire; And a contentious man to stir up strife. The Venet. translates פּחם by καρβών, and גּחלת by ἄνθραξ; the former (from פּחם, Arab. faḥuma, to be deep black) is coal in itself; the latter (from גּחל, jaham, to set on fire, and intrans. to burn), coal in a glowing state (e.g., Pro 25:22; Eze 1:13).