10 Matthew then proceeds with his narrative in the same connection as follows: “Then comes Jesus with them unto a place called Gethsemane.” This is mentioned also by Mark. Luke, too, refers to it, although he does not notice the piece of ground by name. For he says: “And He came out, and went, as was His wont, to the Mount of Olives; and His disciples also followed Him. And when He was at the place, He said unto them, Pray that you enter not into temptation.” That is the place which the other two have instanced under the name of Gethsemane.
There, we understand, was the garden which John brings into notice when he gives the following narration: “When Jesus had spoken these words, He went forth with His disciples over the brook Cedron, where was a garden, into the which He entered, and His disciples.” Then taking Matthew's record, we get this statement next in order: “He said unto His disciples, Sit ye here, while I go and pray yonder. And He took with Him Peter and the two sons of Zebedee, and began to be sorrowful and very heavy.
Then says He unto them, My soul is exceeding sorrowful, even unto death: tarry ye here, and watch with me. And He went a little farther, and fell on His face, and prayed, saying, O my Father, if it be possible, let this cup pass from me: nevertheless not as I will, but as You will. And He comes unto the disciples, and finds them asleep, and says unto Peter, What! could ye not watch with me one hour? Watch and pray, that you enter not into temptation: the spirit indeed is willing, but the flesh is weak.
He went away again the second time, and prayed, saying, O my Father, if this cup may not pass away from me except I drink it, Your will be done. And He came and found them asleep again: for their eyes were heavy. And He left them, and went away again, and prayed the third time, saying the same words. Then comes He to His disciples, and says unto them, Sleep on now, and take your rest: behold, the hour is at hand, and the Son of man shall be betrayed into the hands of sinners. Rise, let us be going: behold, he is at hand that shall betray me.”
Source: The Harmony of the Gospels (New Advent)