Behold, I show you a mystery; We shall not all sleep, but we shall all be changed, (15:51)

--1 Thessalonians--

For this we say unto you by the word of the Lord, that we which are alive [and] remain unto the coming of the Lord shall not prevent them which are asleep. (4:15)

Then we which are alive [and] remain shall be caught up together with them in the clouds, to meet the Lord in the air: and so shall we ever be with the Lord. (4:17)