TEXT 10
yāmāś catvāraś catvāro
martyānām ahanī ubhe
pakṣaḥ pañca-daśāhāni
śuklaḥ kṛṣṇaś ca mānada
SYNONYMS
yāmāḥ—three hours; catvāraḥ—four; catvāraḥ—and four; martyānām—of the human beings; ahanī—duration of day; ubhe—both day and night; pakṣaḥ—fortnight; pañca-daśa—fifteen; ahāni—days; śuklaḥ—white; kṛṣṇaḥ—black; ca—also; mānada—measured.
TRANSLATION
It is calculated that there are four praharas, which are also called yāmas, in the day and four in the night of the human being. Similarly, fifteen days and nights are a fortnight, and there are two fortnights, white and black, in a month.

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