Peter denied that he was Jesus’ disciple.

John 18:15-18

15 Simon Peter and I were following Jesus. Because the high priest knew me, his doorkeeper permitted me to enter the courtyard. 16 But Peter had to wait outside near the doorway. However, since I knew the high priest, I went back to the doorway and spoke to the girl who was guarding the entrance. Then she allowed Peter to come in. 17 The servant girl who was guarding the doorway said to Peter, “Surely you are not another disciple of that man they have arrested, are you?” He said, “I am not.” 18 It was cold, so the high priest’s slaves and Temple guards made a charcoal fire and were standing around it to keep warm. Peter was also standing near it, warming himself.