18 Then they also which are fallen asleep in Christ are perished.
1 Corinthians 15:18 Cross References - UKJV
1 Corinthians 15:6
6 After that, he was seen of above five hundred brethren at once; of whom the greater part remain unto this present, but some are fallen asleep.
1 Thessalonians 4:13-14
1 Thessalonians 4:16
16 For the Lord himself shall descend from heaven with a shout, with the voice of the archangel, and with the trump of God: and the dead in Christ shall rise first:
Revelation 14:13
13 And I heard a voice from heaven saying unto me, Write, Blessed are the dead which die in the Lord from henceforth: Yea, says the Spirit, (o. pneuma) that they may rest from their labours; and their works do follow them.