John 21:7; John 21:20; John 21:24
This made the disciple whom Jesus loved say to Peter, "It is the Master." Simon Peter therefore, when he heard the words, "It is the Master," drew on his fisherman's shirt--for he had not been wearing it--put on his girdle, and sprang into the water.
Peter turned round and noticed the disciple whom Jesus loved following--the one who at the supper had leaned back on His breast and had asked, "Master, who is it that is betraying you?"
That is the disciple who gives his testimony as to these matters, and has written this history; and we know that his testimony is true.