Peter turned and saw the disciple whom Jesus loved following them. He was the one who had leaned back against Jesus at the supper to ask, “Lord, who is going to betray You?”
KJV
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?
ASV
Peter, turning about, seeth the disciple whom Jesus loved following; who also leaned back on his breast at the supper, and said, Lord, who is he that betrayeth thee?