Behold,
I shew you a mystery;
We shall not all sleep, but we shall all be changed,
In a moment, in the twinkling of an eye,
at the last trump: for the trumpet shall sound,
and the dead shall be raised incorruptible, and we shall be changed.
I Corinthians 15:51 - 52

For the Lord himself shall descend from heaven
with a shout, with the voice of the archangel, and with the trump of God:
and the dead in Christ shall rise first:
Then we which are alive and remain
shall be caught up together with them in the clouds,
to meet the Lord in the air: and so shall we ever be with the Lord.
Wherefore comfort one another with these words.
I Thessalonians 4:16 - 18