…there shall be weeping and gnashing of teeth

The expression “weeping and gnashing of teeth”, in Greek, ο κλαυθμός και ο βρυγμος των οδοντών, is raised by Jesus as an expression that reminds the abominable for God, and the horrible in the memory of the people, of what was the long-observed practice of burning children alive as part of the cult of the Canaanite gods Baal and Moloch,

Luke’s First Treatise to Theophilus and the Purpose of his Writing

The first treatise is not a writing parallel to the other Gospels, despite the parity of the accounts between them, because unlike the others it was not written in order to leave testimony of the acts of Jesus but to validate the truth of the things in which they were both taught, the writer and the recipient, by those who from the beginning were eyewitnesses, and ministers of the word.