20But turning around Peter sees the disciple whom Jesus loved following (that is the one who reclined on His chest at the supper and said, “Lord, who is the one who is betraying you?”).
21Seeing him, Peter says to Jesus, “Lord, what about him?”
22Jesus says to him: “If I want him to remain until I come, what is that to you? You follow me.”
23So this saying spread among the brothers, that this disciple would not die. Yet Jesus did not say to him Peter that he John would not die, but, “If I want him to remain until I come, what is that to you?”
24This is the disciple who is testifying to these things, and who wrote them; and we know that his testimony is true.
John 21
John 21:20-24