1 Corinthians 15:52

in a moment, in the twinkling of an eye, at the last trumpet; for the trumpet shall sound, and the dead be raised, indestructible, and we shall be changed.

1 Thessalonians 4:16

for the Lord himself will descend from heaven with a shout, with the voice of an archangel, and with the trumpet of God, and the dead in Christ 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 last trumpet; for the trumpet shall sound, and the dead be raised, indestructible, and we shall be changed.
1 Thessalonians 4:16
for the Lord himself will descend from heaven with a shout, with the voice of an archangel, and with the trumpet of God, and the dead in Christ shall rise first,