Matthew 27:52

the tombs opened, and the bodies of many of God's People who had fallen asleep rose,

1 Corinthians 15:20

But, in truth, Christ has been raised from the dead, the first-fruits of those who are at rest.

1 Thessalonians 4:14

For, as we believe that Jesus died and rose again, so also we believe that God will bring, with Jesus, those who through him have passed to their rest.

John 5:25-29

In truth I tell you that a time is coming, indeed it is already here, when the Dead will listen to the voice of the Son of God, and when those who listen will live.

Acts 7:60

Falling on his knees, he called out loudly: "Lord! do not charge them with this sin;" and with these words he fell asleep.

1 Corinthians 11:30

That is why so many among you are weak and ill, and why some are sleeping.

1 Corinthians 15:51

Listen, I will tell you God's hidden purpose! We shall not all have passed to our rest, but we shall all be transformed-in a moment, in the twinkling of an eye,

1 Thessalonians 5:10

That, whether we are still watching or have fallen asleep, we may live 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
In truth I tell you that a time is coming, indeed it is already here, when the Dead will listen to the voice of the Son of God, and when those who listen will live.
1 Corinthians 15:20
But, in truth, Christ has been raised from the dead, the first-fruits of those who are at rest.

Slept

1 Corinthians 11:30
That is why so many among you are weak and ill, and why some are sleeping.
1 Corinthians 15:51
Listen, I will tell you God's hidden purpose! We shall not all have passed to our rest, but we shall all be transformed-in a moment, in the twinkling of an eye,
1 Thessalonians 4:14
For, as we believe that Jesus died and rose again, so also we believe that God will bring, with Jesus, those who through him have passed to their rest.
1 Thessalonians 5:10
That, whether we are still watching or have fallen asleep, we may live with him.

General references

Mark 15:38
The Temple curtain was torn in two from top to bottom.
Luke 19:40
But Jesus answered: "I tell you that if these men are silent, the very stones will call out."