Psalms 31:18 KJV
Let the lying lips be put to silence; which speak grievous things proudly and contemptuously against the righteous.
Psalms 31:18, King James Version
In context
17 Let me not be ashamed, O Lord; for I have called upon thee: let the wicked be ashamed, and let them be silent in the grave.
18 Let the lying lips be put to silence; which speak grievous things proudly and contemptuously against the righteous.
19 Oh how great is thy goodness, which thou hast laid up for them that fear thee; which thou hast wrought for them that trust in thee before the sons of men!