1 Thessalonians 4:14
For if we believe that Jesus died and rose again (the very Foundation of Christianity is the Death and Resurrection of Christ; it is the proof of life after death in a glorified state for all Saints in that life, which incidentally will never end), even so them also which sleep in Jesus will God bring with Him. (this refers to the Rapture of the Church, or the Resurrection of all Believers, with both phrases meaning the same thing, even as Paul describes in 1 Cor., Chpt. 15. At death, the soul and the spirit of the Child of God instantly go to be with Jesus [Phil. 1:23], while the physical body goes back to dust. At the Rapture, God will replace what was the physical body with a Glorified Body, United with the soul and the spirit. In fact, the soul and the spirit of each individual will accompany the Lord down close to this Earth to be united with a Glorified Body, which will then make the Believer whole. *
*JSM study Bible