Proverbs 26:23 (BSB)

Like glaze covering an earthen vessel are burning lips and a wicked heart.

From Proverbs 26. Also in the ESV.

Commentary on Proverbs 26:23

• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Proverbs 26:23: This may be meant either, 1. Of a wicked heart showing itself in burning lips, furious, passionate, outrageous words, burning in malice, and persecuting those to whom, or of whom, they are spoken; ill words and ill-will agree as well together as a potsherd and the dross of silver, which, now that the pot is broken and the dross separated from the silver, are fit...
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Proverbs 26:23: He that hateth dissembleth with his lips,.... He that bears a grudge in his mind, and retains hatred in his heart against any person, hides it all he can, till he has an opportunity of showing it as he would; he pretends a great deal of friendship with his lips, that his hatred might not be known; he would be thought to be a friend...
• Jamieson-Fausset-Brown (Reformed), Commentary Critical and Explanatory on the Whole Bible on Proverbs 26:23: Warm professions can no more give value to insincerity than silver coating to rude earthenware.
• Geneva Bible Notes (Reformed), Geneva Bible Study Notes on Proverbs 26:23: Burning lips and a wicked heart [are like] a potsherd covered with silver dross. (k) They will soon break out and utter themselves.