Mark 14:26-31

26 They sang a hymn and then went directly to Mount Olives.
27 Jesus told them, "You're all going to feel that your world is falling apart and that it's my fault. There's a Scripture that says, I will strike the shepherd; The sheep will go helter-skelter.
28 "But after I am raised up, I will go ahead of you, leading the way to Galilee."
29 Peter blurted out, "Even if everyone else is ashamed of you when things fall to pieces, I won't be."
30 Jesus said, "Don't be so sure. Today, this very night in fact, before the rooster crows twice, you will deny me three times."
31 He blustered in protest, "Even if I have to die with you, I will never deny you." All the others said the same thing.