'Gnashing of Teeth' in the Bible

But the sons of the kingdom shall be cast out into outer darkness; there shall be weeping and gnashing of teeth.

and shall cast them into a furnace of fire. There shall be wailing and gnashing of teeth.

and shall cast them into the furnace of fire. There shall be wailing and gnashing of teeth.

Then the king said to the servants, Bind him hand and foot and take him away, and cast him into outer darkness. There shall be weeping and gnashing of teeth.

And He shall cut him apart and appoint him his portion with the hypocrites. There shall be weeping and gnashing of teeth.

And throw the unprofitable servant into outer darkness; there shall be weeping and gnashing of teeth.