Matthew 27:52

the tombs were opened, and a number of bodies of the saints who slept the sleep of death rose up ??53 they left the tombs after his resurrection and entered the holy city and appeared to a number of people.

1 Corinthians 15:20

But it is not so! Christ did rise from the dead, he was the first to be reaped of those who sleep in death.

1 Thessalonians 4:14

Since we believe that Jesus died and rose again, then it follows that by means of Jesus God will bring with him those who have fallen asleep.

John 5:25-29

Truly, truly I tell you, the time is coming, it has come already, when the dead will listen to the voice of the Son of God, and those who listen will live;

Acts 7:60

Then he knelt down and cried aloud, "Lord, let not this sin stand against them!" With these words he slept the sleep of death.

1 Corinthians 11:30

That is why many of you are ill and infirm, and a number even dead.

1 Corinthians 15:51

Here is a secret truth for you: not all of us are to die, but all of us are to be changed ??52 changed in a moment, in the twinkling of an eye, at the last trumpet-call. The trumpet will sound, the dead will rise imperishable, and we shall be changed.

1 Thessalonians 5:10

who died for us that waking in life or sleeping in death we should 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
Truly, truly I tell you, the time is coming, it has come already, when the dead will listen to the voice of the Son of God, and those who listen will live;
1 Corinthians 15:20
But it is not so! Christ did rise from the dead, he was the first to be reaped of those who sleep in death.

Slept

1 Corinthians 11:30
That is why many of you are ill and infirm, and a number even dead.
1 Corinthians 15:51
Here is a secret truth for you: not all of us are to die, but all of us are to be changed ??52 changed in a moment, in the twinkling of an eye, at the last trumpet-call. The trumpet will sound, the dead will rise imperishable, and we shall be changed.
1 Thessalonians 4:14
Since we believe that Jesus died and rose again, then it follows that by means of Jesus God will bring with him those who have fallen asleep.
1 Thessalonians 5:10
who died for us that waking in life or sleeping in death we should live together with him.

General references

Mark 15:38
And the curtain of the temple was torn in two, from top to bottom.
Luke 19:40
But he replied, "I tell you, if they were to keep quiet, the very stones would shout."