Matthew 27:52

and the tombs were opened, and many bodies of saints that slept arose,

1 Corinthians 15:20

But now Christ has been raised from the dead, a first fruit of those that have slept.

1 Thessalonians 4:14

For if we believe that Jesus died and rose again, so also will God bring with him those that have fallen asleep on account of Jesus.

John 5:25-29

I tell you most truly, that the hour comes, and now is, when the dead shall hear the voice of the Son of God, and those that hear shall live.

Acts 7:60

And kneeling down he cried with a loud voice, Lord, lay not this sin to their charge. And having said this he fell asleep.

1 Corinthians 11:30

For this reason many are weak and sick among you and some sleep.

1 Corinthians 15:51

Behold, I tell you a mystery; we shall not all sleep, but we shall all be changed,

1 Thessalonians 5:10

who died for us, that, whether we wake or sleep, we may live together with him.

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
I tell you most truly, that the hour comes, and now is, when the dead shall hear the voice of the Son of God, and those that hear shall live.
1 Corinthians 15:20
But now Christ has been raised from the dead, a first fruit of those that have slept.

Slept

1 Corinthians 11:30
For this reason many are weak and sick among you and some sleep.
1 Corinthians 15:51
Behold, I tell you a mystery; we shall not all sleep, but we shall all be changed,
1 Thessalonians 4:14
For if we believe that Jesus died and rose again, so also will God bring with him those that have fallen asleep on account of Jesus.
1 Thessalonians 5:10
who died for us, that, whether we wake or sleep, we may live together with him.

General references

Mark 15:38
And the vail of the temple was rent in two, from top to bottom;
Luke 19:40
And he answered and said to them, I tell you that if these should be silent the stones would cry out.