Valmiki Ramayana 4.28.64
उपकारेण वीरो हि प्रतिकारेण युज्यते ।अकृतज्ञो अप्रतिकृतो हन्ति सत्त्ववताम् मनः॥
upakāreṇa vīro hi pratikāreṇa yujyate |akṛtajño apratikṛto hanti sattvavatām manaḥ ||
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book