Mar 14:37 And he cometh, and findeth them sleeping, and saith unto Peter, Simon, sleepest thou? couldest not thou watch one hour? 38 Watch ye and pray, lest ye enter into temptation. The spirit truly is ready, but the flesh is weak. 39 And again he went away, and prayed, and spake the same words. 40 And when he returned, he found them asleep again, (for their eyes were heavy,) neither wist they what to answer him. 41 And he cometh the third time, and saith unto them, Sleep on now, and take your rest: it is enough, the hour is come; behold, the Son of man is betrayed into the hands of sinners. 42 Rise up, let us go; lo, he that betrayeth me is at hand.
I doubt the disciples got much sleep for many days to come. Arrest, trial, crucifixion, hiding out in the upper room, the resurrection, the appearances of the risen Lord, the Great Commission…so many things that would keep them lying awake with eyes wide open for a while.
That little nap in Gethsemane had to suffice for a long time.
Although, it would have been much more appropriate for this apostolic trio to be in prayer, someone once wisely said, "Sometimes, one of the most spiritual things we can do is to take a nap."
And to that, I say, "Amen!!!"