Proverbs 26:23 KJV
Burning lips and a wicked heart are like a potsherd covered with silver dross.
Proverbs 26:23, King James Version
In context
22 The words of a talebearer are as wounds, and they go down into the innermost parts of the belly.
23 Burning lips and a wicked heart are like a potsherd covered with silver dross.
24 He that hateth dissembleth with his lips, and layeth up deceit within him;