John 13:34-38 New Revised Standard Version (NRSV)
34 I give you a new commandment, that you love one another. Just as I have loved you, you also should love one another. 35 By this everyone will know that you are my disciples, if you have love for one another.”
Jesus Foretells Peter’s Denial
36 Simon Peter said to him, “Lord, where are you going?” Jesus answered, “Where I am going, you cannot follow me now; but you will follow afterward.” 37 Peter said to him, “Lord, why can I not follow you now? I will lay down my life for you.” 38 Jesus answered, “Will you lay down your life for me? Very truly, I tell you, before the cock crows, you will have denied me three times.