Burning lips — i.e., burning with love, while there is an evil heart within.
A potsherd covered with silver dross. — Pottery glazed with dross of silver, a well-known method of ornamentation. For similar proverbs, comp. Matthew 23:27; Luke 11:39.
Related Commentaries of Proverbs 26:23
Proverbs 26:23
23 Burning lips and a wicked heart are like a potsherd covered with silver dross.