Thirukkural 509

தேறற்க யாரையும் தேராது தேர்ந்தபின் தேறுக தேறும் பொருள்.

Tēṟṟṛka yāraiyum tēṟātu tēṟntappin tēṟuka tēṟum pōrul.

Do not judge any person until you have examined carefully; after you have judged, trust what you have determined to be true.