John 21:20-24

²⁰Then Peter, turning round, saw the disciple who was dear to Jesus coming after them — the disciple who was resting on his breast at the last meal, and said, Lord, who is it who will be false to you?

²¹Seeing him, Peter said to Jesus, What about this man?

²²Jesus said to him, If it is my desire for him to be here till I come back, what is that to you? come yourself after me.

²³So this saying went about among the brothers that this disciple would not undergo death: Jesus, however, did not say that he would not undergo death, but, If it is my desire for him to be here till I come back, what is that to you?

²⁴This is the disciple who gives witness about these things and who put them in writing: and we have knowledge that his witness is true.