Matthew 16:24

16:24 Then Jesus said to his disciples, “If anyone wants to become my follower, he must deny himself, take up his cross, and follow me.

Matthew 26:34-35

26:34 Jesus said to him, “I tell you the truth, on this night, before the rooster crows, you will deny me three times.” 26:35 Peter said to him, “Even if I must die with you, I will never deny you.” And all the disciples said the same thing.

Matthew 26:75

26:75 Then Peter remembered what Jesus had said: “Before the rooster crows, you will deny me three times.” And he went outside and wept bitterly.