Then He came and found them sleeping, and said to Peter, "Simon, are you sleeping? Could you not watch one hour? Watch and pray, lest you enter into temptation.
The spirit indeed is willing, but the flesh is weak."
Mark 14:37-38

Peter and the others were sleeping when Jesus had asked them to pray. Two thoughts:

First, there are times when we might be so sleepy that trying to stay awake to pray is rather fruitless. In those moments, might it be that our kind and loving Lord would say, “Sleep, child. You need the rest. We’ll talk later.”? Having had moments when weariness rendered my prayers incoherent, I think the Lord might say such a thing. There are times when it is okay to fall asleep praying.

On the other hand, however, let’s be honest about the times when prayer gets crowded out of our lives in favor of lesser things. Too busy? Too tired because of poor time and energy management? Disinterested or lazy? In these instances, might not the Lord say, “Are you still [fill in the blank]? Could you not pray even for a few moments? Watch and pray lest you fall into temptation and drift away spiritually. Your spirit needs Me; so don’t succumb to the weakness of your flesh.”

Brethren, let us pray!

A footnote: If you wake in the night and cannot fall back asleep, instead of counting sheep, count your blessings and pray for others. I think the Lord is pleased when we fall asleep praying in this way!