Like a coating of silver dross on earthenware are fervent lips with an evil heart.
NIV
Burning lips [uttering insincere words of love] and a wicked heart are like an earthen vessel covered with the scum thrown off from molten silver [making it appear to be solid silver].
AMP
Burning lips and a wicked heart are like a potsherd covered with silver dross.
KJV
The words of a gossip are like choice morsels; they go down to the inmost parts.
NIV
The words of a whisperer or slanderer are like dainty morsels or words of sport [to some, but to others are like deadly wounds]; and they go down into the innermost parts of the body [or of the victim's nature].
AMP
The words of a talebearer are as wounds, and they go down into the innermost parts of the belly.
KJV