Matthew 26:40

And though Jesus went but a little forward, they could not watch one hour in His absence; let us therefore pray that Jesus may never depart even a little from us.

When then He returned to His disciples and found them sleeping, He rebukes Peter, Could ye not watch one hour with me? He addresses Peter rather than the rest, because he had most loudly boasted that he would not be offended.

Not without reason doth He inveigh against Peter most, although the others also had slept; but to make him feel by this also, for the cause which I mentioned before. Then because the others also said the same thing (for when Peter had said (these are the words), "Though I must die with Thee, I will not deny Thee; likewise also," it is added, "said all the disciples"); He addresses Himself to all, convicting their weakness. For they who are desiring to die with Him, were not then able so much as to sorrow with Him wakefully, but sleep overcame them.

Or the sleep which He would have them forego is not bodily rest, for which at this critical time there was no room, but mental torpor, the sleep of unbelief.

However, even these He dismisses: "And He went on a little farther, and prayeth, saying, Father, if it be possible, let this cup pass from me; nevertheless not as I will, but as Thou wilt. And He cometh unto them, and findeth them sleeping, and saith unto Peter, What, could ye not watch with me one hour? Watch and pray, that ye enter not into temptation; the spirit indeed is willing, but the flesh is weak." And He prays with earnestness, in order that the thing might not seem to be acting. And sweats flow over him for the same cause again, even that the heretics might not say this, that He acts the agony. Therefore there is a sweat like drops of blood, and an angel appeared strengthening Him, and a thousand sure signs of fear, lest any one should affirm the words to be feigned. For this cause also was this prayer. By saying then, "If it be possible, let it pass from me," He showed His humanity; but by saying, "Nevertheless not as I will, but as Thou wilt," He showed His virtue and self-command, teaching us even when nature pulls us back, to follow God. For since it was not enough for the foolish to show His face only, He uses words also. Again, words sufficed not alone, but deeds likewise were needed; these also He joins with the words, that even they who are in a high degree contentious may believe, that He both became man and died. For if, even when these things are so, this be still disbelieved by some, much more, if these had not been. See by how many things He shows the reality of the incarnation: by what He speaks, by what He suffers. After that He cometh and saith to Peter, as it is said, "What, couldest thou not watch one hour with me?" All were sleeping, and He rebukes Peter, hinting at him, in what He spake. And the words, "with me," are not employed without reason; it is as though He had said, Thou couldest not watch with me one hour, and wilt thou lay down thy life for me? and what follows also, intimates this self-same thing. For "Watch," saith He, "and pray not to enter into temptation." See how He is again instructing them not to be self-confident, but contrite in mind, and to be humble, and to refer all to God.