Exodus 19:16-19

16On the morning of the athird day there were bthunders and lightnings and ca thick cloud on the mountain and a very loud dtrumpet blast, so that all the people in the camp etrembled. 17Then fMoses brought the people out of the camp to meet God, and they took their stand at the foot of the mountain. 18Now gMount Sinai was wrapped in smoke because the Lord had descended on it in fire. The smoke of it went up like the smoke of a kiln, and hthe whole mountain trembled greatly. 19And as the isound of the trumpet grew louder and louder, Moses spoke, and jGod answered him in thunder.

1 Corinthians 15:52

52in a moment, in the twinkling of an eye, at the last trumpet. For kthe trumpet will sound, and lthe dead will be raised imperishable, and we shall be changed.

1 Thessalonians 4:16

16For mthe Lord himself will descend nfrom heaven owith a cry of command, with the voice of pan archangel, and qwith the sound of the trumpet of God. And rthe dead in Christ will rise first.
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