In the Book of Revelation, the Bible says to signal the apocalyptic events seen by John of Patmos in his vision (Revelation 1:9), seven trumpets are sounded, one at a time (Revelation 1:1).
Alerts of impending danger: Israel's watchmen would sound the trumpet to signal danger. Prophets give us unequivocal warnings about the dangers we face today. Additionally, we must keep in mind that "every man who has been warned becomes to warn his neighbor, in mildness and in meekness."
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