15 Simon Peter and another disciple followed Jesus. That other disciple was known to the Chief Priest, and so he went in with Jesus to the Chief Priest's courtyard. 16 Peter had to stay outside. Then the other disciple went out, spoke to the doorkeeper, and got Peter in. 17 The young woman who was the doorkeeper said to Peter, "Aren't you one of this man's disciples?" He said, "No, I'm not." 18 The servants and police had made a fire because of the cold and were huddled there warming themselves. Peter stood with them, trying to get warm.
19 Annas interrogated Jesus regarding his disciples and his teaching. 20 Jesus answered, "I've spoken openly in public. I've taught regularly in meeting places and the Temple, where the Jews all come together. Everything has been out in the open. I've said nothing in secret. 21 So why are you treating me like a conspirator? Question those who have been listening to me. They know well what I have said. My teachings have all been aboveboard." 22 When he said this, one of the policemen standing there slapped Jesus across the face, saying, "How dare you speak to the Chief Priest like that!" 23 Jesus replied, "If I've said something wrong, prove it. But if I've spoken the plain truth, why this slapping around?" 24 Then Annas sent him, still tied up, to the Chief Priest Caiaphas.
25 Meanwhile, Simon Peter was back at the fire, still trying to get warm. The others there said to him, "Aren't you one of his disciples?" He denied it, "Not me." 26 One of the Chief Priest's servants, a relative of the man whose ear Peter had cut off, said, "Didn't I see you in the garden with him?" 27 Again, Peter denied it. Just then a rooster crowed.
Matthew Henry's Commentary on John 18:15-27
Commentary on John 18:13-27
(Read John 18:13-27)
Simon Peter denied his Master. The particulars have been noticed in the remarks on the other Gospels. The beginning of sin is as the letting forth of water. The sin of lying is a fruitful sin; one lie needs another to support it, and that another. If a call to expose ourselves to danger be clear, we may hope God will enable us to honour him; if it be not, we may fear that God will leave us to shame ourselves. They said nothing concerning the miracles of Jesus, by which he had done so much good, and which proved his doctrine. Thus the enemies of Christ, whilst they quarrel with his truth, wilfully shut their eyes against it. He appeals to those who heard him. The doctrine of Christ may safely appeal to all that know it, and those who judge in truth bear witness to it. Our resentment of injuries must never be passionate. He reasoned with the man that did him the injury, and so may we.