Śrīmad-Bhāgavatam 3.11.10
యామాశ్చత్వారశ్చత్వారో మర్త్యానామహనీ ఉభే ।
పక్ష: పఞ్చదశాహాని శుక్ల: కృష్ణశ్చ మానద ॥ ౧౦ ॥
yāmāś catvāraś catvāro
[yaamaash chatvaarash chatvaaro]
martyānām ahanī ubhe
[martyaanaam ahanee ubhe]
pakṣaḥ paṣca-daśāhāni
[pakshah pashcha-dashaahaani]
śuklaḥ kṛṣṇaś ca mānada
[shuklah krishnash cha maanada]
Word-for-word
yāmāḥ
—
three hours
catvāraḥ
—
four
catvāraḥ
—
and four
martyānām
—
of the human beings
ahanī
—
duration of day
ubhe
—
both day and night
pakṣaḥ
—
fortnight
paṣca-daśa
—
fifteen
ahāni
—
days
śuklaḥ
—
white
kṛṣṇaḥ
—
black
ca
—
also
mānada
—
measured.
Blended reading (Sanskrit + English inline)
yāmāś catvāraś catvāro
yāmāḥ
three hours
catvāraḥ
four
catvāraḥ
and four
martyānām ahanī ubhe
martyānām
of the human beings
ahanī
duration of day
ubhe
both day and night
pakṣaḥ paṣca-daśāhāni
pakṣaḥ
fortnight
paṣca-daśa
fifteen
ahāni
days
śuklaḥ kṛṣṇaś ca mānada
śuklaḥ
white
kṛṣṇaḥ
black
ca
also
mānada
measured.
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.
Gauḍīya Ācāryas
Viśvanātha Cakravartī Ṭhākura
Gauḍīya
Translation
For the human beings, there are four yāmas in the day and four yāmas in the night. There are fifteen days in the waxing phase of the moon, and fifteen days in the waning phase of the moon.
Ahanī means day and night.
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Source: vedabase.io