Matthew 8:12

12 But other people who think that God's kingdom belongs to them will not be there. God's angels will throw them into the dark places that are far away from God. There those people will weep very much. They will bite their teeth together.’

8:12Jesus was talking about many of Israel's people, the Jews. God chose the Israelites to be his special people. But many of them did not obey God, so they could not belong to his kingdom. Biting their teeth together may have shown that they were angry. Or it may have shown they were in much pain.