But he began to curse and to swear,.... To wish the most dreadful things upon himself, and to swear by the living God;

saying, I know not this man of whom ye speak: See Gill on Matthew 26:74.

Curse (ἀναθεματίζειν)

Compare on Matthew 26:74; where the word is καταθεματίζειν, to call down (κατὰ) curses on himself if he were not telling the truth. The words are synonymous.

But he began to curse and to swear, saying, I know not this man of whom ye speak.

14:66-72 As Peter was beneath in the palace. See notes on Mt 26:69-75. Compare Lu 22:54-62 Joh 18:15-17,25-27.

71. But he began to curse-"anathematize," or wish himself accursed if what he was now to say was not true.

and to swear-or to take a solemn oath.

saying, I know not this man of whom ye speak.

14:66-72 Peter's denying Christ began by keeping at a distance from him. Those that are shy of godliness, are far in the way to deny Christ. Those who think it dangerous to be in company with Christ's disciples, because thence they may be drawn in to suffer for him, will find it much more dangerous to be in company with his enemies, because there they may be drawn in to sin against him. When Christ was admired and flocked after, Peter readily owned him; but will own no relation to him now he is deserted and despised. Yet observe, Peter's repentance was very speedy. Let him that thinketh he standeth take heed lest he fall; and let him that has fallen think of these things, and of his own offences, and return to the Lord with weeping and supplication, seeking forgiveness, and to be raised up by the Holy Spirit.