Mark 14:70-72

But again he denied it. And after a little while the bystanders were again saying to Peter, “Surely you are one of them, for you are a Galilean too.” But he began to curse and swear, “I do not know this man you are talking about!” Immediately a rooster crowed a second time. And Peter remembered how Jesus had made the remark to him, “Before a rooster crows twice, you will deny Me three times.” And he began to weep.