Matthew 27:52

the tombs opened; and many of God's people who were asleep in death awoke.

1 Corinthians 15:20

But, in reality, Christ *has* risen from among the dead, being the first to do so of those who are asleep.

1 Thessalonians 4:14

For if we believe that Jesus has died and risen again, we also believe that, through Jesus, God will bring with Him those who shall have passed away.

John 5:25-29

"In most solemn truth I tell you that a time is coming--nay, has already come--when the dead will hear the voice of the Son of God, and those who hear it will live.

Acts 7:60

Then, rising on his knees, he cried aloud, "Lord, do not reckon this sin against them." And with these words he fell asleep.

1 Corinthians 11:30

That is why many among you are sickly and out of health, and why not a few die.

1 Corinthians 15:51

I tell you a truth hitherto kept secret: we shall not all sleep, but we shall all be changed,

1 Thessalonians 5:10

who died on our behalf, so that whether we are awake or are sleeping we may share His Life.

Treasury of Scripture Knowledge

Summary

And the graves were opened; and many bodies of the saints which slept arose,

General references

Bible References

Many

John 5:25
"In most solemn truth I tell you that a time is coming--nay, has already come--when the dead will hear the voice of the Son of God, and those who hear it will live.
1 Corinthians 15:20
But, in reality, Christ *has* risen from among the dead, being the first to do so of those who are asleep.

Slept

1 Corinthians 11:30
That is why many among you are sickly and out of health, and why not a few die.
1 Corinthians 15:51
I tell you a truth hitherto kept secret: we shall not all sleep, but we shall all be changed,
1 Thessalonians 4:14
For if we believe that Jesus has died and risen again, we also believe that, through Jesus, God will bring with Him those who shall have passed away.
1 Thessalonians 5:10
who died on our behalf, so that whether we are awake or are sleeping we may share His Life.

General references

Mark 15:38
And the curtain in the Sanctuary was torn in two, from top to bottom.
Luke 19:40
"I tell you," He replied, "that if *they* became silent, the very stones would cry out."