John
Chapters 13:35-38
English Revised Version
35By this shall all men know that ye are my disciples, if ye have love one to another.
36Simon Peter saith unto him, Lord, whither goest thou? Jesus answered, Whither I go, thou canst not follow me now; but thou shalt follow afterwards.
37Peter saith unto him, Lord, why cannot I follow thee even now? I will lay down my life for thee.
38Jesus answereth, Wilt thou lay down thy life for me? Verily, verily, I say unto thee, The cock shall not crow, till thou hast denied me thrice.