Kural - 793

Temper, descent, defects, associations free
From blame: know these, then let the man be friend to thee

Explanation
Make friendship (with one) after ascertaining (his) character, birth, defects and the whole of one's relations.

Tamil Transliteration
Kunamum Kutimaiyum Kutramum Kundraa
Inanum Arindhiyaakka Natpu.