John 21:20-23

20Peter turned and saw the disciple whom Jesus loved following them. He was the one who had leaned back against Jesus1 at the supper to ask, “Lord, who is going to betray You?” 21When Peter saw him, he asked, “Lord, what about him?”

22Jesus answered, “If I want him to remain until I return, what is that to you? You follow Me!” 23Because of this, the rumor spread among the brothers that this disciple would not die. However, Jesus did not say that he would not die, but only, “If I want him to remain until I return, what is that to you?”