Matthew 26:74-75

74Then he began to curse [that is, to invoke God’s judgment on himself] and swear [an oath], “I do not know the man!” And at that moment a rooster crowed.

75And Peter remembered the [prophetic] words of Jesus, when He had said, “Before a rooster crows, you will deny Me three times.” And he went outside and wept bitterly [in repentance].