Matthew 26:40

And [when] He came [back] to where His disciples were and found them asleep, He said to Peter, "What [is this], could you not remain alert with me [in prayer] for one hour?

Matthew 25:5

Now when the [bride and] groom were late [in arriving], the bridesmaids all got drowsy and fell asleep.

Matthew 26:35

Peter replied to Him, "Even if I have to die with you, still I will not deny [knowing] you." And all [the rest of] the disciples said the same thing.

Matthew 26:43

And He came [back] again and found them asleep, because they had not been able to keep their eyes open.

Matthew 26:38

Then He said to them, "My soul is extremely grieved, even to [the point where I could] die. Stay here and be alert with me [i.e., in prayer]."

Mark 14:37

And when He came back and found His disciples sleeping He said to Peter, "Simon, are you sleeping? Could you not stay alert [in prayer] for one hour?

Luke 9:32

Now Peter and those with him [i.e., James and John] had been very sleepy, but became wide awake when they saw the splendor of Jesus and the two men standing with Him.

Luke 22:45

And when He got up from praying He went to His disciples and found them asleep, exhausted from grief.

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 He came [back] again and found them asleep, because they had not been able to keep their eyes open.
Matthew 25:5
Now when the [bride and] groom were late [in arriving], the bridesmaids all got drowsy and fell asleep.
Mark 14:37
And when He came back and found His disciples sleeping He said to Peter, "Simon, are you sleeping? Could you not stay alert [in prayer] for one hour?
Luke 9:32
Now Peter and those with him [i.e., James and John] had been very sleepy, but became wide awake when they saw the splendor of Jesus and the two men standing with Him.
Luke 22:45
And when He got up from praying He went to His disciples and found them asleep, exhausted from grief.

What

Matthew 26:35
Peter replied to Him, "Even if I have to die with you, still I will not deny [knowing] you." And all [the rest of] the disciples said the same thing.

General references

Matthew 26:70
But he denied [it] in front of all of them, saying, "I do not know what you are talking about."
Mark 13:33
"You should pay attention; be alert and pray, for you do not know when the time will come [i.e., for the Lord to return].
1 Corinthians 10:12
So, the person who thinks he is standing firm [in the faith] should pay attention [to his life], so that he does not fall [away from God].