“Then went this saying abroad among the brethren, that that disciple should not die: yet Jesus said not unto him, He shall not die; but, If I will that he tarry till I come, what is that to thee?”
John 21:23 — Greek Interlinear
Church Fathers on John 21:23
Our Lord having foretold to Peter by what hat death he should glorify God, bids him follow Him. And when He had spoken this, He says to him, Follow Me. Why does He say, Follow Me, to Peter, and not to the others who were present, who as disciples were following their Master? Or if we understand it of his martyrdom, was Peter the only one who died for the Christian truth? Was not James put to death by Herod? Some one will say that James was not crucified, and that this was…
Peter hearing that he was to suffer death for Christ, asks whether John was to die: Then Peter, turning about, sees the disciple whom Jesus loved following; which also leaned on His breast at supper, and said, Lord, which is he that betrays you? Peter seeing him says to Jesus, Lord, and what shall this man do?
I will that he tarry, i.e. I will not that he suffer martyrdom, but wait for the quiet dissolution of the flesh, when I shall come and receive him into eternal blessedness.