John 13:33-38

Little children, yet a little while I am with you. Ye shall seek me: and as I said unto the Jews, Whither I go, ye cannot come; so now I say unto you. A new commandment I give unto you, that ye love one another; even as I have loved you, that ye also love one another. By this shall all men know that ye are my disciples, if ye have love one to another. Simon Peter saith unto him, Lord, whither goest thou? Jesus answered, Whither I go, thou canst not follow me now; but thou shalt follow afterwards. Peter saith unto him, Lord, why cannot I follow thee even now? I will lay down my life for thee. Jesus 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.