Mark 14:68-72 New King James Version (NKJV)
68 But he denied it, saying, “I neither know nor understand what you are saying.” And he went out on the porch, and a rooster crowed.
69 And the servant girl saw him again, and began to say to those who stood by, “This is one of them.” 70 But he denied it again.
71 Then he began to curse and swear, “I do not know this Man of whom you speak!”
72 A second time the rooster crowed. Then Peter called to mind the word that Jesus had said to him, “Before the rooster crows twice, you will deny Me three times.” And when he thought about it, he wept.
Mark 14:68-72 Living Bible (TLB)
68 Peter denied it. “I don’t know what you’re talking about!” he said, and walked over to the edge of the courtyard.
Just then, a rooster crowed.[a]
69 The maid saw him standing there and began telling the others, “There he is! There’s that disciple of Jesus!”
70 Peter denied it again.
A little later others standing around the fire began saying to Peter, “You are, too, one of them, for you are from Galilee!”
71 He began to curse and swear. “I don’t even know this fellow you are talking about,” he said.
72 And immediately the rooster crowed the second time. Suddenly Jesus’ words flashed through Peter’s mind: “Before the cock crows twice, you will deny me three times.” And he began to cry.