1 Thessalonians 4:15-16

4:15 For we tell you this by the word of the Lord, that we who are alive, who are left until the coming of the Lord, will surely not go ahead of those who have fallen asleep. 4:16 For the Lord himself will come down from heaven with a shout of command, with the voice of the archangel, and with the trumpet of God, and the dead in Christ will rise first.