Thirukkural

செய்யாமல் செய்த உதவிக்கு வையகமும் வானகமும் ஆற்றல் அரிது.

Seyyaamal Seydha Udhavikku Vaiyakamum Vaanakamum Aatral Aridhu

(The gift of) heaven and earth is not an equivalent for a benefit which is conferred where none had been received