Thirukkural 40

செயற்பால தோரும் அறனே ஒருவற்கு உயற்பால தோரும் பழி.

SeyaRpāla thōrum araṉē ōruvRṟu Uyaṟpāla thōrum pazhi.

What you are capable of doing, you ought to do with righteousness; what lies within your reach to endure, you will answer for—shame attends every neglect.