Mark 14:70-72

But again he denied it. After a little while, the bystanders again said to Peter, “You are in fact one of them, for [it is clear from your accent, that] you are a Galilean, too.” But he began to invoke a curse [on himself] and to swear [an oath], “I do not know this man you are talking about!” Immediately a rooster crowed the second time. And Peter remembered what Jesus said to him: “Before a rooster crows twice, you will deny Me three times.” And thinking of this, he began weeping [in anguish].