Luke 22:45

When He rose from His prayer, He went to the disciples and found them asleep from sorrow.

Matthew 26:40

Then He came back to the disciples and found them asleep. He said to Peter, "Could you not then watch with me a single hour?

Matthew 26:43

He came back again and found them still sleeping, for their eyes were so heavy they could hardly hold them open.

Mark 14:37

And He went back and found them asleep, and He said to Peter, "Simon, are you asleep? Could you not watch a single hour?

Mark 14:40-41

When He went back again, He found them asleep again, for their eyes were so heavy they could hardly hold them open; and they did not know what answer to make Him.

Treasury of Scripture Knowledge

Summary

And when he rose up from prayer, and was come to his disciples, he found them sleeping for sorrow,

General references

Bible References

Sleeping

Matthew 26:40
Then He came back to the disciples and found them asleep. He said to Peter, "Could you not then watch with me a single hour?
Mark 14:37
And He went back and found them asleep, and He said to Peter, "Simon, are you asleep? Could you not watch a single hour?

General references

John 16:6
but sorrow has taken complete possession of your hearts, because I have told you these things.