1 Corinthians 15:58 Therefore, my beloved brothers, be steadfast, immovable, always abounding in the work of the LORD, knowing that in the LORD your labor is not in vain.

Paul's teaching on the resurrection of Christians: when the last trumpet blasts and Christ returns for those who belong to Him. In that moment, all believers in Jesus, living and dead, will be transformed into the glorified, eternal bodies God has promised us and death can be defeated forever