Manu 1.73
तद् वै युगसहस्रान्तं ब्राह्मं पुण्यम् अहर् विदुः) । रात्रिं च तावतीम् एव ते ऽअहोरात्रविदो जनाः ॥
tad vai yugasahasrāntaṃ brāhmaṃ puṇyam ahar viduḥ) | rātriṃ ca tāvatīm eva te 'ahorātravido janāḥ ||
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
Those (only, who) know that the holy day of Brahman, indeed, ends after (the completion of) one thousand ages (of the gods) and that his night lasts as long, (are really) men acquainted with (the length of) days and nights.
Translated by Georg Bühler