Psalm 31:18 in the World English Bible
Let the lying lips be mute, which speak against the righteous insolently, with pride and contempt.
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!