अग्निनिचयः (Agninichaya) / The Accumulation of Sacred Fire & the Classification of Pitṛs by Time-Order
पार्वण्यस्ति थयः संध्याः पक्षा मासार्द्धसंमिताः / निमेषाश्च कलाः कष्ठा मुहुर्त्ता दिवसाः क्षयाः
pārvaṇyasti thayaḥ saṃdhyāḥ pakṣā māsārddhasaṃmitāḥ / nimeṣāśca kalāḥ kaṣṭhā muhurttā divasāḥ kṣayāḥ
Parva-seasons and the twilight junctions, the fortnights and the half-month measures—these are the stations of time. Nimeṣas, kalās, kāṣṭhās, muhūrtas, days, and waning (kṣaya) are also its reckonings.