Mark 14:71
But he began to curse and swear, “I do not know this man of whom you speak!”
What it says
Peter curses and swears that he does not know the man they are speaking about.
What it is doing
The verse shows the full force of his denial.
In context
66While Peter was in the courtyard below, one of the servant girls of the high priest came down 67and saw him warming himself there. She looked at Peter and said, “You also were with Jesus the Nazarene.” 68But he denied it. “I do not know or even understand what you are talking about,” he said. Then he went out to the gateway, and the rooster crowed. 69There the servant girl saw him and again said to those standing nearby, “This man is one of them.” 70But he denied it again. 71But he began to curse and swear, “I do not know this man of whom you speak!” 72And immediately the rooster crowed a second time.