1 Corinthians 15:52

in a moment, in the twinkling of an eye, at the sound of the last trumpet (for the trumpet shall sound) and the dead shall rise incorruptible; but as for us, we shall be changed.

1 Thessalonians 4:16

for the Lord himself will descend from heaven, and by the voice of the archangel, with the trumpet of God, resound the summons: they who died christians shall rise first:

Treasury of Scripture Knowledge

Summary

Speak unto the children of Israel, saying, In the seventh month, in the first day of the month, shall ye have a sabbath, a memorial of blowing of trumpets, an holy convocation.

Bible References

In the seventh

1 Corinthians 15:52
in a moment, in the twinkling of an eye, at the sound of the last trumpet (for the trumpet shall sound) and the dead shall rise incorruptible; but as for us, we shall be changed.
1 Thessalonians 4:16
for the Lord himself will descend from heaven, and by the voice of the archangel, with the trumpet of God, resound the summons: they who died christians shall rise first: