NET
20 Peter turned around and saw the disciple whom Jesus loved following them. (This was the disciple who had leaned back against Jesus’ chest at the meal and asked, “Lord, who is the one who is going to betray you?”)
Darby
20 Peter, turning round, sees the disciple whom Jesus loved following, who also leaned at supper on his breast, and said, Lord, who is it that delivers thee up?
KJV
20 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?