רִֽ֭יבְךָ רִ֣יב אֶת־רֵעֶ֑ךָ וְס֖וֹד אַחֵ֣ר אַל־תְּגָֽל׃
As-tu un procès avec, ton prochain, défends-le, mais sans dévoiler des secrets qui ne t’appartiennent pas:
Rashi on Proverbs
Have your quarrel with your friend But if, perforce, you must quarrel and debate with your friend, in any event, do not divulge another’s secret Do not mention to him the disgrace of his ancestors, which not everyone knows, and you are revealing it.