1 Thessalonians 4:15-18

For the Lord himself shall come down from heaven with commandment and with the voice of an archangel and with the trumpet of God: and the dead who are in Christ shall rise first.

Then we who are alive, who are left, shall be taken up together with them in the clouds to meet Christ, into the air: and so shall we be always with the Lord.

Wherefore, comfort ye one another with these words.