Charles Ellicott Commentary Proverbs 25:9

"Debate thy cause with thy neighbor [himself], And disclose not the secret of another;" — Proverbs 25:9 (ASV)

Debate thy cause with thy neighbour.— As our Lord says, “If thy brother trespass against thee, go and tell him his fault between thee and him alone” (Matthew 18:15). Or it may mean, “If you must go to law with another, do not drag others into the matter by disclosing their secrets in order to help your cause.”