Prajāpati-vaṃśānukīrtana — Genealogical Enumeration of Progenitors
Dharma’s Line and the Sādhyas
अहोरात्रकलानां तु षडशीत्यधिकाः स्मृताः / रवेर्गति विशेषेण सर्वर्त्तुषु च नित्यशः
ahorātrakalānāṃ tu ṣaḍaśītyadhikāḥ smṛtāḥ / ravergati viśeṣeṇa sarvarttuṣu ca nityaśaḥ
The kalās of a day and night are remembered as more than eighty-six; by the particular course of the Sun, this holds ever the same through all the seasons.