John 21:7; John 21:20; John 21:24
Then the disciple whom Jesus loved said to Peter, "It's the Lord!" When Simon Peter heard it was the Lord, he wrapped his coat around himself (for he was naked) and jumped into the water.
Peter turned around and saw the disciple whom Jesus loved following them. This was the one who had leaned against Jesus at the meal and asked him, "Lord, who is going to betray you?"
This is the disciple who testifies concerning these things and who wrote them down. We know that his testimony is true.