Mark 14:30-31

14:30 Jesus said to him, “I tell you the truth, today – this very night – before a rooster crows twice, you will deny me three times.” 14:31 But Peter insisted emphatically, “Even if I must die with you, I will never deny you.” And all of them said the same thing.

Mark 8:34

Following Jesus

8:34 Then Jesus called the crowd, along with his disciples, and said to them, “If anyone wants to become my follower, he must deny himself, take up his cross, and follow me.

Mark 14:72

14:72 Immediately a rooster crowed a second time. Then Peter remembered what Jesus had said to him: “Before a rooster crows twice, you will deny me three times.” And he broke down and wept.