1 Corinthians 15:6
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.
Cross-reference
In 1 Corinthians 15:18, Paul uses the same phrase 'fallen asleep' to argue that without resurrection, those believers are lost — linking back to the sleeping ones mentioned here.
In 1 Corinthians 15:51, Paul reveals the mystery that believers alive at Christ's return will be transformed, contrasting with those who have 'fallen asleep' in verse 6.
In 1 Thessalonians 4:13, Paul comforts believers about 'those who sleep' — providing the hopeful context for the 'fallen asleep' phrase used here.
In 1 Thessalonians 4:15, Paul explains that the 'fallen asleep' will rise first at Christ's coming — adding eschatological detail to their state mentioned here.
Matthew 28:10 commands the disciples to go to Galilee, setting the stage for the large appearance to over 500.
Matthew 28:16 describes an appearance to the eleven disciples in Galilee, a separate event from the 500 but part of the same post-resurrection period.
In Mark 16:7, the angel promises the disciples will see Jesus in Galilee — the fulfillment of which includes the appearance to over 500 listed here.
In 2 Peter 3:4, scoffers use the death of earlier generations to deny Christ's return — contrasting with Paul's use of 'fallen asleep' as hope for resurrection.