Peter, turning around, saw the disciple whom Jesus loved following, the one who also had leaned on his chest at supper and said, "Lord, who is it who shall betray you?
Other versions
King James Version
Then Peter, turning about, seeth the disciple whom Jesus loved following; which also leaned on his breast at supper, and said, Lord, which is he that betrayeth thee?English Standard Version
Peter turned and saw the disciple whom Jesus loved following them, the one who had been reclining at table close to him and had said, "Lord, who is it that is going to betray you?"New International Version
Peter turned and saw that the disciple whom Jesus loved was following them. (This was the one who had leaned back against Jesus at the supper and had said, "Lord, who is going to betray you?")