Matthew 26:40

Then he came to his disciples, and found them asleep. "What!" he said to Peter, "could none of you watch with me for one hour?

Matthew 25:5

As the bridegroom was late in coming, they all became drowsy, and slept.

Matthew 26:35

"Even if I must die with you," Peter exclaimed, "I shall never disown you!" All the disciples spoke in the same way.

Matthew 26:43

And coming back again he found them asleep, for their eyes were heavy.

Matthew 26:38

"I am sad at heart," he said, "sad even to death; wait here and watch with me."

Mark 14:37

Then he came and found the three Apostles asleep. "Simon," he said to Peter, "are you asleep? Could not you watch for one hour?

Luke 9:32

Peter and his companions had been overpowered by sleep but, suddenly becoming wide awake, they saw Jesus glorified and the two men who were standing beside him.

Luke 22:45

Then he rose from praying, and came to the disciples and found them sleeping for sorrow.

Treasury of Scripture Knowledge

Summary

And he cometh unto the disciples, and findeth them asleep, and saith unto Peter, What, could ye not watch with me one hour?

Bible References

And findeth

Matthew 26:43
And coming back again he found them asleep, for their eyes were heavy.
Matthew 25:5
As the bridegroom was late in coming, they all became drowsy, and slept.
Mark 14:37
Then he came and found the three Apostles asleep. "Simon," he said to Peter, "are you asleep? Could not you watch for one hour?
Luke 9:32
Peter and his companions had been overpowered by sleep but, suddenly becoming wide awake, they saw Jesus glorified and the two men who were standing beside him.
Luke 22:45
Then he rose from praying, and came to the disciples and found them sleeping for sorrow.

What

Matthew 26:35
"Even if I must die with you," Peter exclaimed, "I shall never disown you!" All the disciples spoke in the same way.

General references

Matthew 26:70
But Peter denied it before them all. "I do not know what you mean," he replied.
Mark 13:33
See that you are on the watch; for you do not know when the time will be.
1 Corinthians 10:12
Therefore let the man who thinks that he stands take care that he does not fall.