John 21:20-23 - Peter And The Other Disciple Jesus Loved
20 Peter, turning about, sees the disciple whom Jesus loved following; who also at the Supper leaned back on Jesus' breast, and said, "Lord, who is he that betrays Thee?" 21 Peter therefore, seeing him, says to Jesus, "Lord, and what will this man do?"
22 Jesus saith to him, "If I wish him to remain till I come, what is it to you? follow Me."
23 This saying, therefore, went forth among the brethren, that that disciple should not die; yet Jesus did not say to him, that he should not die, but, "If I wish him to remain till I come, what is it to you?"