As Jesus predicted, Peter denied three times that he knew Jesus.

Mark 14:66-72

66 While Peter was outside in the courtyard of the supreme priest’s house, one of the girls who worked for the supreme priest came near him. 67 When she saw Peter warming himself beside the fire, she looked at him closely. Then she said, “You also were with Jesus, that man from Nazareth town!” 68 But he denied it by saying, “I do not know or understand [DOU] what you are talking about!” Then he went away from there to the gate of the courtyard. 69 The servant girl saw him there and said to the people who were standing nearby, “This man is one of those who have been with that man they arrested.” 70 But he denied it again. After a little while, one of those who were standing there said to Peter again, “The way you speak shows that you also are from Galilee district. So it is certain that you are one of those who accompanied Jesus!” 71 But he began to exclaim, “I do not know the man that you are talking about! Because God knows that I am speaking truthfully, may he punish me if I am lying!” 72 Immediately the rooster crowed a second time. Then Peter remembered what Jesus had said to him before, “Before the rooster crows a second time, you will deny three times that you know me.” When he realized that he had denied it three times, he started crying.