'Asleep' in the Bible

then he appeared to more than five hundred brothers at once, the majority of whom remain until now, but some have fallen asleep.

And as a further result, those who have fallen asleep in Christ have perished.

But now Christ has been raised from the dead, the first fruits of those who have fallen asleep.

Behold, I tell you a mystery: we will not all fall asleep, but we will all be changed,