3 John 1:12
Demetrius hath good report of all men, and of the truth itself: yea, and we also bear record; and ye know that our record is true.
Cross-reference
3 John 1:6 also mentions believers testifying about someone's love — both verses in the same letter use testimony to commend individuals.
John 19:35 affirms the eyewitness's testimony is true — mirroring 3 John's claim that 'our testimony is true' and from the truth itself.
John 21:24 declares the disciple's testimony is true — the same phrase 'we know his testimony is true' used here for Demetrius.
1 Timothy 3:7 requires an overseer to be 'well thought of by outsiders' — directly parallels Demetrius's good testimony from everyone.
Acts 6:3 shows the early church selecting men of good reputation — the same standard of 'good testimony' applied to Demetrius here.
1 Timothy 5:10 lists qualifications for widows, including having a reputation for good works — same concept of good testimony applied to Demetrius.
1 Samuel 2:24 reports 'no good report' about Eli's sons — contrasting with Demetrius's good testimony from everyone.
Acts 10:22 describes Cornelius as 'well spoken of' — a parallel to Demetrius's good testimony from everyone.
Acts 22:12 notes Ananias was 'well spoken of' — like Demetrius, he had a good reputation among the Jews.
2 Corinthians 6:8 describes being treated as impostors yet true — contrasting with Demetrius who has a good testimony from the truth itself.