Shloka 5.59.34
हनूमद्वृत्तान्तः—वानरबलप्रशंसा च (Hanuman’s Report and Praise of the Vanara Host)
नियतस्समुदाचारो भक्तिर्भर्तरि चोत्तमा।यन्न हन्ति दशग्रीवं सा महात्मा कृतागसम्।।।।
nimittamātraṃ rāmas tu vadhe tasya bhaviṣyati | sā prakṛtyaiva tanvaṅgī tadviyogāc ca karśitā || pratipatpāṭhaśīlasya vidyeva tanumatāṃ gatā ||
Rama will be but the instrument of his death. As for her—slender by nature and further wasted by separation—she has grown thin like learning in a student who studies only on the first day and then neglects it.
"Ravana is a great soul because, even though he has done harm to her, he is not killed. This is so because Sita being a chaste woman of good conduct and deep devotion towards her husband (she refrained from killing Ravana as she wanted her husband to do that.)
When adharma ripens, its fall becomes inevitable; the righteous may serve as the ‘instrument’ of justice rather than acting from personal rage—justice as duty, not vendetta.
Hanuman reassures Rama about Ravana’s impending downfall and reports Sita’s worsening physical condition due to separation.
Rama’s role as dharma’s executor (nimitta of justice), and Sita’s unwavering fidelity despite bodily decline.