John 20:24, 25 - Now Thomas, called the Twin, one of the twelve, was not with them when Jesus came. The other disciples therefore said to him, "We have seen the Lord." So he said to them, "Unless I see in His hands the print of the nails, and put my finger into the print of the nails, and put my hand into His side, I will not believe." [NKJV]
Peter, one of Jesus' disciples, denied knowing him three times before Jesus' crucifixion. After Jesus' resurrection, Peter became a prominent leader in the early Christian church.
It was Pewter who denied knowing Jesus three times.
Here Judas betrayed Jesus and peter denied Jesus three times.
Peter denied Jesus three times, Judas betrayed Jesus, and they all ran away.
Peter denied Jesus because he was afraid if the crowd, who wanted to kill Jesus, knew he was one of Jesus' disciples. They would want to kill him as well. Overall, he was afraid of prison and death.
Judas denied knowing Jesus. The disciple Peter denied knowing Christ three times when questioned about his association with him in the hours after Jesus' arrest. Christ had predicted this would happen, and Peter vowed he never would. He was to bitterly regret his defection of his Lord, and worked diligently to establish the early church.
Here Peter never betrayed jesus, he denied knowing Jesus thrice. But it was Judas who really betrayed Jesus.
Judas Iscariot betrayed jesus for 30 pieces of silver (about a month's wages for a non-skilled worker). He basically told the ruling council of the Temple, and the priests, where he could be found so he could be arrested in secret. This was to prevent his many supporters from rioting as many regarded him as the promised messiah. Note there were 2 Judases in the diciples (the other being Judas, son of Alpheus) and so it was Judas Iscariot who was the betayer. Peter didn't betray Jesus but he did deny ever knowing him (3 times) at his trial, to save his own skin. However, after the resurrection, Jesus forgave him and reinstated him as leader of the disciples. Peter was his supporter. ANOTHER ANSWER: Directly; Judas. Indirectly; Peter and all of Jesus' disciples abandoned and betrayed Him when they "denied" knowing Him; fearing the Jews more than their Master. Peter denied Him, directly, three times... the other disciples, running away, denied Him through their cowardly, unconverted, carnal minded, totally human reaction to the terrifying circumstances.
It was Peter who denied Jesus three times.
After Jesus was taken prisoner by the temple guards and chief priests and was being tried by them Peter denied Our Lord three times.
He denied knowing Jesus three times because he was afraid that the Romans would crucify him as well.
Off hand, I would say that of the twelve disciples, John and Peter were His two closest friends. John, in his gospel called himself "the disciple whom Jesus loved". Peter was the one who after he had denied Jesus three times, was asked by Jesus: "Peter do you love me?" three times.