1 Thessalonians 4:16-17

16On that day, the Lord himself will come down from heaven. He will shout with authority. People will hear the voice of the leader of God's angels. They will hear the sound of God's trumpet. Then those people who have died as Christians will become alive again. They will be the first people to rise up.

17After that, those of us who are still alive will join together with them. God will suddenly take us up into the clouds. In that way, we will all meet the Lord in the sky. So we will all be with the Lord for ever.