'Gnashing' in the Bible

but the sons of the kingdom shall be cast forth into the outer darkness: there shall be the weeping and the gnashing of teeth.

and shall cast them into the furnace of fire: there shall be the weeping and the gnashing of teeth.

and shall cast them into the furnace of fire: there shall be the weeping and the gnashing of teeth.

Then the king said to the servants, Bind him hand and foot, and cast him out into the outer darkness; there shall be the weeping and the gnashing of teeth.

and shall cut him asunder, and appoint his portion with the hypocrites: there shall be the weeping and the gnashing of teeth.

And cast ye out the unprofitable servant into the outer darkness: there shall be the weeping and the gnashing of teeth.