Mark 14:72

72 At that moment the cock crowed for the second time. Then Peter remembered that Jesus had said to him, "Before the cock crows twice, you will deny me three times." And he broke down and wept.

Mark 14:72 In-Context

70 But again he denied it. Then after a little while the bystanders again said to Peter, "Certainly you are one of them; for you are a Galilean."
71 But he began to curse, and he swore an oath, "I do not know this man you are talking about."
72 At that moment the cock crowed for the second time. Then Peter remembered that Jesus had said to him, "Before the cock crows twice, you will deny me three times." And he broke down and wept.
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.