Mark 14:29-31

29But Peter said to Him, “Even if they all fall away [and desert You, ashamed and afraid of being associated with You], yet I will not [do so]!”

30Jesus said to him, “I assure you and most solemnly say to you, this very night, before a rooster crows twice, you will deny [that you even know] Me three times.”

31But Peter kept saying insistently, “If I have to die with You, I will not deny You!” And they all were saying the same thing as well.