1 Corinthians 15:50-52

50 I declare to you, brothers, that flesh and blood cannot inherit the kingdom of God, nor does the perishable inherit the imperishable.

51 Listen, I tell you a mystery: We will not all sleep, but we will all be changed--

52 in a flash, in the twinkling of an eye, at the last trumpet. For the trumpet will sound, the dead will be raised imperishable, and we will be changed.