What you don't see with your eyes, don't witness with your mouth.

This proverb warns against repeating claims you cannot personally verify. It links sight (“with your eyes”) to speech (“with your mouth”), implying that testimony and gossip carry moral weight: words can harm reputations, mislead communities, and entangle the speaker in falsehood. In Jewish ethical thought, the caution resonates with norms against lashon hara (harmful speech) and rechilut (talebearing), where even technically true statements can be wrong to spread if they cause unjust damage. The saying therefore promotes restraint, epistemic humility, and responsibility in communication—especially when acting as a “witness” in social or legal senses.