John 21:24
This is the disciple who is testifying to these things and has written them, and we know that his testimony is true — John's final attribution identifies the beloved disciple as the Gospel's author-witness. The testimony (martyria) is eyewitness attestation grounded in intimate knowledge ('he reclined next to Jesus'). The corporate affirmation ('we know') suggests community endorsement of the beloved disciple's reliability and authority. This verse establishes apostolic authority for the Johannine tradition.