Psalm 35:15-16

But when I stumbled, they gathered in glee; assailants gathered against me without my knowledge. They slandered me without ceasing. Like the ungodly they maliciously mocked; they gnashed their teeth at me.

But when I stumbled, they gathered in glee 
Job 31:9-11  "If my heart has been enticed by a woman, or if I have lurked at my neighbor's door, then may my wife grind another man's grain, and may other men sleep with her. For that would have been wicked, a sin to be judged."

They slandered me without ceasing 
Job 16:10  "People open their mouths to jeer at me; they strike my cheek in scorn and unite together against me."

Like the ungodly they maliciously mocked 
Psalm 22:7  All who see me mock me; they hurl insults, shaking their heads.
Mark 10:33-34  "We are going up to Jerusalem," he (Jesus) said, "and the Son of Man will be delivered over to the chief priests and the teachers of the law. They will condemn him to death and will hand him over to the Gentiles, who will mock him and spit on him, flog him and kill him. Three days later he will rise."

they gnashed their teeth at me 
Job 16:9  "God assails me and tears me in his anger and gnashes his teeth at me; my opponent fastens on me his piercing eyes."
Mark 9:17-18  A man in the crowd answered, "Teacher, I brought you my son, who is possessed by a spirit that has robbed him of speech. Whenever it seizes him, it throws him to the ground. He foams at the mouth, gnashes his teeth and becomes rigid. I asked your disciples to drive out the spirit, but they could not."
Acts 7:54  When the members of the Sanhedrin heard this, they were furious and gnashed their teeth at him (Stephen).

(parentheses are mine)

Scriptures taken from the Holy Bible, New International Version® NIV®, Copyright© 1973, 1978, 1984, 2011 by Biblica, Inc.® Used by permission. All rights reserved worldwide. 
Limited to 15 verses per post.