Then Simon Peter having a sword drew it, and struck the high priest's servant, and cut off his right ear. The servant's name was Malchus.
All Commentaries on John 18:10 Go To John 18
John Chrysostom
AD 407
Peter trusting to these last words of our Lord’s, and to what He had just done, assaults those who came to take Him: Then Simon Peter having a sword drew it, and smote the high priest’s servant. But how, commanded as he had been to have neither scrip, nor two garments, had he a sword? Perhaps he had foreseen this occasion, and provided one.
But how could he, who had been forbidden ever to strike on the cheek, be a murderer? Because what he had been forbidden to do was to avenge himself, but here he was not avenging himself, but his Master. They were not however yet perfect: afterwards you shall see Peter beaten with stripes, and bearing it humbly. And cut off his right ear: this seems to show the impetuosity of the Apostle; that he struck at the head itself.
He wrought this miracle both to teach us, that we ought to do good to those who suffer and to manifest His power. The Evangelist gives the name, that those who then read it might have the opportunity of inquiring into the truth of the account. And he mentions that he was the servant of the high priest, because in addition to the miracle of the cure itself, this shows that it was performed upon one of those who came to take Him, and who shortly after struck Him on the face.
He not only restrained Him however by threats, but consoled him also at the same time: The cup that My Father gives Me, shall I not drink it? Whereby He shows that it was not by their power, but by His permission, that this had been done, and that He did not oppose God, but was obedient even to death.