John the Apostle
John 18:25ESV·traditional attribution

Now Simon Peter was standing and warming himself. So they said to him, “You also are not one of his disciples, are you?” He denied it and said, “I am not.”

John Calvin Reformed @genevareformer

25. He denied it. How shocking the stupidity of Peter, who, after having denied his Master, not only has no feeling of repentance, but hardens himself by the very indulgence he takes in sinning! If each of them in his turn had asked him, he would not have hesitated to deny his Master a thousand times.

Matthew Henry Presbyterian @wholebiblehenry

We have here an account of Christ's arraignment before the high priest, and some circumstances that occurred therein which were omitted by the other evangelists; and Peter's denying him, which the other evangelists had given the story of entire by itself, is interwoven with the other passages.

Commenting on John 18:13-27

John Gill Reformed Baptist @doctorgill

And Simon Peter stood and warmed himself,.... This is repeated from Joh 18:18 to connect the history, and carry on the thread of the account of Peter's denial of Christ, which is interrupted by inserting the examination of Christ before the high priest, which was made at the same time.