Mark 14:70-72 New American Bible, Revised Edition (NABRE)

70. Once again he denied it. A little later the bystanders said to Peter once more, “Surely you are one of them; for you too are a Galilean.”

71. He began to curse and to swear, “I do not know this man about whom you are talking.”

72. And immediately a cock crowed a second time. Then Peter remembered the word that Jesus had said to him, “Before the cock crows twice you will deny me three times.” He broke down and wept.

Mark 14