1 Corinthians 15:52

in a moment, in the twinkling of an eye, at the sound of the last trumpet. For the trumpet will sound, and the dead will be raised with bodies not subject to decay, and we shall be changed.

1 Thessalonians 4:16

For the Lord Himself, at the summons sounded by the archangel's call and by God's trumpet, will come down from heaven, and first of all the dead in union with Christ will rise,

Hebrews 12:20

for they did not try to bear the order, "Even if a wild animal touches the mountain, it must be stoned to death,"

Treasury of Scripture Knowledge

Summary

There shall not an hand touch it, but he shall surely be stoned, or shot through; whether it be beast or man, it shall not live: when the trumpet soundeth long, they shall come up to the mount.

Bible References

When the trumpet

1 Corinthians 15:52
in a moment, in the twinkling of an eye, at the sound of the last trumpet. For the trumpet will sound, and the dead will be raised with bodies not subject to decay, and we shall be changed.
1 Thessalonians 4:16
For the Lord Himself, at the summons sounded by the archangel's call and by God's trumpet, will come down from heaven, and first of all the dead in union with Christ will rise,