Luke 22:45

And, arising from prayer, he came unto his disciples, and found them falling asleep by reason of their grief;

Matthew 26:40

And he cometh unto his disciples, and findeth them sleeping, and said unto Peter - Thus, powerless are ye, one hour, to watch with me?

Matthew 26:43

And coming, he, again, found them sleeping, for their eyes had become heavy.

Mark 14:37

And he cometh and findeth them sleeping, and saith unto Peter - Simon! art thou sleeping? Hadst thou not strength, one hour, to watch?

Mark 14:40-41

And, again, coming, he found them sleeping, for their eyes were being, weighed down, - and they knew not what to answer 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
And he cometh unto his disciples, and findeth them sleeping, and said unto Peter - Thus, powerless are ye, one hour, to watch with me?
Mark 14:37
And he cometh and findeth them sleeping, and saith unto Peter - Simon! art thou sleeping? Hadst thou not strength, one hour, to watch?

General references

John 16:6
But, because, these things, I have told you, sorrow, hath filled your heart.