John 21:20-24

²⁰Peter turned around and saw the disciple whom Jesus loved following them, the one who had also leaned back against the side of Jesus at the dinner and who had said, “Lord, who is the one who will betray you?”

²¹Peter saw him and then said to Jesus, “Lord, what will this man do?”

²²Jesus said to him, “If I want him to stay until I come, what is that to you? Follow me.”

²³So this statement spread among the brothers, that that disciple would not die. Yet Jesus did not say to Peter that the other disciple would not die, but, “If I want him to stay until I come, what is that to you?”

²⁴This is the disciple who testifies about these things, and who wrote these things, and we know that his testimony is true.