Job 16:9
He teareth me in his wrath, who hateth me: he gnasheth upon me with his teeth; mine enemy sharpeneth his eyes upon me.
Psalms 37:12
The wicked plotteth against the just, and gnasheth upon him with his teeth.
Mark 9:18
And wheresoever he taketh him, he teareth him: and he foameth, and gnasheth with his teeth, and pineth away: and I spake to thy disciples that they should cast him out; and they could not.