Luke 22:45

And, arising from prayer, and coming to the disciples, He found them sleeping for grief,

Matthew 26:40

And He cometh to the disciples, and findeth them sleeping, and saith to Peter, "Were ye thus unable to watch with Me one hour?

Matthew 26:43

And, coming again, He found them sleeping; for their eyes were heavy.

Mark 14:37

And He cometh and findeth them sleeping, and saith to Peter, "Simon, are you sleeping? were you not able to watch one hour?

Mark 14:40-41

And, returning, He found them again sleeping, for their eyes were very heavy; 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 to the disciples, and findeth them sleeping, and saith to Peter, "Were ye thus unable to watch with Me one hour?
Mark 14:37
And He cometh and findeth them sleeping, and saith to Peter, "Simon, are you sleeping? were you not able to watch one hour?

General references

John 16:6
But, because I have spoken these things to you, sorrow has filled your heart.