John 13:21-25
John 13:21 (KJB)
When Jesus had thus said, he was troubled in spirit, and testified, and said, Verily, verily, I say unto you, that one of you shall betray me.
Jesus was very troubled in His spirit because now was the time He was revealing that Judas was about to betray Him. Here we see another example of the humanity of Christ. (Psa 41:9 KJV) Yea, mine own familiar friend, in whom I trusted, which did eat of my bread, hath lifted up his heel against me. The betrayal by Judas was a prophesied event so it had to take place but even so, it caused the Lord Jesus to be troubled in His spirit because He walked with Judas for three years and they probably became good friends. The problem is that greedy people do not make and keep friends with people, because money is their friend which eventually lets them down.
John 13:22 (KJB)
Then the disciples looked one on another, doubting of whom he spake.
When the Lord Jesus stated that one would betray Him, they were looking to each other because they were perplexed at this revelation. They walked with Jesus for three years and went through dangerous situations with Him and now He states that one would betray Him. This situation was prophesied in the Hebrew Scriptures and maybe they were not well versed in those Scriptures. They would have doubted what Jesus said because they felt they were a closely knit group even thought there were differences among them at times.
John 13:23 (KJB)
Now there was leaning on Jesus' bosom one of his disciples, whom Jesus loved.
Here we have the Apostle John leaning on the bosom of Jesus. Now Jesus would have loved all His disciples equally but John is pointing out here a specific disciple which could be referring to himself. I heard a preacher some years back make a case that this disciple leaning on Jesus was Lazarus. (John 11:36 KJV) Then said the Jews, Behold how he loved him! I do not know about that because this supper would have been only for His disciples in these last hours, so I would probably have to agree with tradition that this is speaking about John. John was also given the privilege of not only writing the gospel which bears his name, but also the great privilege of receiving, witnessing the events of, and writing the Book of Revelation.
John 13:24 (KJB)
Simon Peter therefore beckoned to him, that he should ask who it should be of whom he spake.
Beckoned - Nod or signal by nodding
It was not known where Peter was seated but he was able to be in eye contact with John and he wanted John to ask Jesus who it was that He was speaking about. Now I am sure if Peter would have found out, he may have tried to beat the guy up and maybe this is why he was nodding and did not ask out loud. Peter was never at a loss for words and maybe here he wanted to, once again, stop the salvation program of God because of his love for the Lord.
(Mat 16:21-23 KJV) From that time forth began Jesus to show unto his disciples, how that he must go unto Jerusalem, and suffer many things of the elders and chief priests and scribes, and be killed, and be raised again the third day. {22} Then Peter took him, and began to rebuke him, saying, Be it far from thee, Lord: this shall not be unto thee. {23} But he turned, and said unto Peter, Get thee behind me, Satan: thou art an offence unto me: for thou savourest not the things that be of God, but those that be of men.
Remember when Jesus had told the disciples that He must go to Jerusalem and suffer many things and Peter took Jesus aside and said to him and assured Him that these things would not come to pass. Jesus then probably surprised Peter by telling him that he was basically speaking for Satan and that he was looking at these things in favor of manís understanding and not from GodĎs point of view. So maybe once again Peter wanted to prevent anything from happening to the Lord and that is why he gave a silent nod instead of asking who it was?
John 13:25 (KJB)
He then lying on Jesus' breast saith unto him, Lord, who is it?
John then asks Jesus if He would tell them who it is that is going to betray Him. Obviously, John had kept his voice to a minimum so the rest of the disciples would not be aware and in manís thinking, he would not get away without being identified.