Second of the 12 Minor Prophets in the Hebrew scriptures, author of the book of Joel. (His prophecy is part of a larger book, The Twelve, in the Jewish canon.) He lived sometime during the period of the Second Temple of Jerusalem (516 BC–AD 70), but nothing is known of his life. He opens his prophecy by describing a plague of locusts, an allegory of the disasters to come upon a faithless people. His message is simple: salvation will come to Judah only when the people truly turn to Yahweh. The end of the book looks forward to the final days, when all Israel will share in the knowledge of God.