Peter was the only disciple who personally witnessed the crucifixion, whereas the other disciples fled the scene

It is safe to say that we may deem the account provided in the Apocalypse of Peter the most authentic account in respect of the purported incident of crucifixion for, according to the New Testament itself, Peter was the only disciple who personally witnessed the crucifixion, whereas the other disciples fled the scene. We read the following verses in four gospels of the New Testament:

Jesus said unto him, verily I say unto thee, that this night, before the cock crow, thou shalt deny me thrice.
Peter said unto him, though I should die with thee, yet will I not deny thee. Likewise also said all the disciples.
In that same hour said Jesus to the multitudes, Are ye come out as against a thief with swords and staves for to take me? I sat daily with you teaching in the temple, and ye laid no hold on me.
But all this was done, that the scriptures of the prophets might be fulfilled. Then all the disciples forsook him, and fled.
And they that had laid hold on Jesus led him away to Caiaphas the high priest, where the scribes and the elders were assembled.
Now Peter sat without in the palace: and a damsel came unto him, saying, Thou also wast with Jesus of Galilee.
But he denied before them all, saying, I know not what thou sayest.
And when he was gone out into the porch, another maid saw him, and said unto them that were there, this fellow was also with Jesus of Nazareth.
And again he denied with an oath, I do not know the man.
And after a while came unto him they that stood by, and said to Peter, Surely thou also art one of them; for thy speech bewrayeth thee.
Then began he to curse and to swear, saying, I know not the man. And immediately the cock crew.
And Peter remembered the word of Jesus, which said unto him, before the cock crow, thou shalt deny me thrice. And he went out, and wept bitterly.

(Matthew 26:34-35, 55-57, 69-75)

But Peter followed him at a distance, right up to the courtyard of the high priest. He entered and sat down with the guards to see the outcome.

(Matthew 26:58)

Simon Peter and another disciple were following Jesus. Because this disciple was known to the high priest, he went with Jesus into the high priest’s courtyard, but Peter had to wait outside at the door. The other disciple, who was known to the high priest, came back, spoke to the servant girl on duty there and brought Peter in.
“You aren’t one of this man’s disciples too, are you?” she asked Peter.
He replied, “I am not.”
It was cold, and the servants and officials stood around a fire they had made to keep warm. Peter also was standing with them, warming himself.
Meanwhile, the high priest questioned Jesus about his disciples and his teaching.
“I have spoken openly to the world,” Jesus replied. “I always taught in synagogues or at the temple, where all the Jews come together. I said nothing in secret. Why question me? Ask those who heard me. Surely they know what I said.”
When Jesus said this, one of the officials nearby slapped him in the face. “Is this the way you answer the high priest?” he demanded.
“If I said something wrong,” Jesus replied, “testify as to what is wrong. But if I spoke the truth, why did you strike me?” Then Annas sent him bound to Caiaphas the high priest.
Meanwhile, Simon Peter was still standing there warming himself. So they asked him, “You aren’t one of his disciples too, are you?”
He denied it, saying, “I am not.”
One of the high priest’s servants, a relative of the man whose ear Peter had cut off, challenged him, “Didn’t I see you with him in the garden?” Again Peter denied it, and at that moment a rooster began to crow.

(John 18:15-27)

They took Jesus to the high priest, and all the chief priests, the elders and the teachers of the law came together. Peter followed him at a distance, right into the courtyard of the high priest. There he sat with the guards and warmed himself at the fire.
The chief priests and the whole Sanhedrin were looking for evidence against Jesus so that they could put him to death, but they did not find any. Many testified falsely against him, but their statements did not agree.
Then some stood up and gave this false testimony against him: “We heard him say, ‘I will destroy this temple made with human hands and in three days will build another, not made with hands.’” Yet even then their testimony did not agree.
Then the high priest stood up before them and asked Jesus, “Are you not going to answer? What is this testimony that these men are bringing against you?” But Jesus remained silent and gave no answer.
Again the high priest asked him, “Are you the Messiah, the Son of the Blessed One?”
“I am,” said Jesus. “And you will see the Son of Man sitting at the right hand of the Mighty One and coming on the clouds of heaven.”
The high priest tore his clothes. “Why do we need any more witnesses?” he asked. “You have heard the blasphemy. What do you think?”
They all condemned him as worthy of death. Then some began to spit at him; they blindfolded him, struck him with their fists, and said, “Prophesy!” And the guards took him and beat him.
While Peter was below in the courtyard, one of the servant girls of the high priest came by. When she saw Peter warming himself, she looked closely at him.
“You also were with that Nazarene, Jesus,” she said.
But he denied it. “I don’t know or understand what you’re talking about,” he said, and went out into the entryway.
When the servant girl saw him there, she said again to those standing around, “This fellow is one of them.” Again he denied it.
After a little while, those standing near said to Peter, “Surely you are one of them, for you are a Galilean.”
He began to call down curses, and he swore to them, “I don’t know this man you’re talking about.”
Immediately the rooster crowed the second time. Then Peter remembered the word Jesus had spoken to him: “Before the rooster crows twice you will disown me three times.” And he broke down and wept.

(Mark 14:53-72)

Then seizing him, they led him away and took him into the house of the high priest. Peter followed at a distance. And when some there had kindled a fire in the middle of the courtyard and had sat down together, Peter sat down with them. A servant girl saw him seated there in the firelight. She looked closely at him and said, “This man was with him.”
But he denied it. “Woman, I don’t know him,” he said.
A little later someone else saw him and said, “You also are one of them.”
“Man, I am not!” Peter replied.
About an hour later another asserted, “Certainly this fellow was with him, for he is a Galilean.”
Peter replied, “Man, I don’t know what you’re talking about!” Just as he was speaking, the rooster crowed. The Lord turned and looked straight at Peter. Then Peter remembered the word the Lord had spoken to him: “Before the rooster crows today, you will disown me three times.” And he went outside and wept bitterly.

(Luke 22:54-62)

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References:

1- The Holy Bible (Visit biblegateway.com)