Shloka 81
Atithi-satkāra and the Consolation of Wise Counsel (अतिथिसत्कारः प्रज्ञानवचनस्य च पराश्वासनम्)
निर्वाणं परम॑ ब्रह्म धर्मोड्सौ पर उच्यते | तस्मान्न च्युतपूर्वोडहमच्युतस्तेन कर्मणा
nirvāṇaṃ paramaṃ brahma dharmo 'sau para ucyate | tasmān na cyutapūrvo 'ham acyutas tena karmaṇā ||
涅槃――至上のブラフマンと同一とされるもの――こそ最高のダルマであると宣言される。わたしはかつてその境地から落ちたことがなく、その行において揺るがぬゆえ、人々はわたしを「アチュタ」（Acyuta、不落の者）と呼ぶのである。
तामिन्द्र उवाच गच्छ नहुषस्त्वया वाच्योथ<पूर्वेण मामृषियुक्तेन यानेन त्वमधिरूढ
Educational Q&A
The verse equates the highest Dharma with realization of the supreme Brahman (nirvāṇa) and presents ethical-spiritual steadfastness—never ‘falling’ from that truth—as the basis for the epithet ‘Acyuta’ (the Unfallen).
Indra speaks about the supreme goal and the nature of true Dharma, asserting his unwavering adherence to that highest state; this steadfastness is offered as the reason he is called ‘Acyuta’.