After a little while the bystanders came up and said to Peter, “Certainly you too are one of them, for your accent betrays you.”
Then began he to curse, and to swear,.... He swore before, and now he began "to curse"; not Christ, as Saul compelled some to blaspheme him, who professed him, and as the Jews formerly cursed Christ, and his followers, in their synagogues: for Peter's crime was bad enough, it need not be made worse than it was: he could never call Jesus accursed; in so...
Verse 73. And after a while. That is, about an hour after, (Luke.) Peter, by this time, had returned into the palace or hall, and stood warming himself by the fire, . Thy speech betrayeth thee. Your language makes it manifest that you are of his company. That is, as Mark adds, he was a Galilean; and in this way his speech betrayed him.