Meaning: Early in the morning. A call to repentance.
Matthew 26:34
Jesus said unto him, Verily I say unto thee, That this night, before the cock crow, thou shalt deny me thrice.
Matthew 26:73-75
And after a while came unto him they that stood by, and said to Peter, Surely thou also art one of them; for thy speech bewrayeth thee. [74] Then began he to curse and to swear, saying, I know not the man. And immediately the cock crew. [75] And Peter remembered the word of Jesus, which said unto him, Before the cock crow, thou shalt deny me thrice. And he went out, and wept bitterly.