Bhagavad Gita · Akshara Brahma YogaChapter 8, Shloka 17 (8.17)
Original Sanskrit · श्रीभगवान्
सहस्रयुगपर्यन्तमहर्यद् ब्रह्मणो विदुः
रात्रिं युगसहस्रान्तां तेऽहोरात्रविदो जनाः
॥ 8.17 ॥
sahasrayugaparyantamaharyad brahmaṇo viduḥ
rātriṃ yugasahasrāntāṃ te'horātravido janāḥ
Translation
"Those who know that a day of Brahma lasts a thousand yugas, and that his night too lasts a thousand yugas — they alone are the (true) knowers of day and night."
Interpretation
Shankaracharya. Sahasrāṇi yugāni paryantaḥ paryavasānaṃ yasya ahnaḥ — the day whose end comes after a thousand yugas; brahmaṇaḥ prajāpateḥ virājaḥ — of Brahma, Prajapati, Viraj; te aho-rātra-vidaḥ kāla-saṃkhyā-vidaḥ — those who know the reckoning of time; the conclusion: kāla-paricchinnāḥ te ataḥ punar-āvartino lokāḥ — limited by time, and so the worlds are subject to return.
Acharya Ramanuja. Manuṣyādi-caturmukhāntānāṃ mat-saṃkalpa-kṛtāho-rātra-vyavasthā-vidaḥ — those who know that the order of day and night for all, from human beings up to four-faced Brahma, is made by my will; brahmaṇaḥ caturmukhasya yat ahaḥ catur-yuga-sahasrāvasānaṃ — the day of four-faced Brahma lasts a thousand cycles of the four yugas.
AI-assisted draft translation — under review.