1 Corinthians 15:52

in a split second, as quickly as the twinkle of an eye, when the last trumpet blows. For the trumpet will blow and dead people [i.e., believers] will be raised up, never to decay again, and [the living] will be changed [i.e., physically and spiritually].

Treasury of Scripture Knowledge

Summary

So the people took victuals in their hand, and their trumpets: and he sent all the rest of Israel every man unto his tent, and retained those three hundred men: and the host of Midian was beneath him in the valley.

Bible References

Trumpets

1 Corinthians 15:52
in a split second, as quickly as the twinkle of an eye, when the last trumpet blows. For the trumpet will blow and dead people [i.e., believers] will be raised up, never to decay again, and [the living] will be changed [i.e., physically and spiritually].