The Account of Mohinī (Mohinī-kathanam): Ekādaśī Nirṇaya, Daśamī Boundary, and Aruṇodaya
मूहूर्ताः पंचदश च स्मृता रात्रेर्दिनस्य च । ज्ञेयास्ते ह्रस्वदीर्घत्वे त्रैराशिक विधानतः ॥ १४ ॥
mūhūrtāḥ paṃcadaśa ca smṛtā rātrerdinasya ca | jñeyāste hrasvadīrghatve trairāśika vidhānataḥ || 14 ||
Fifteen muhūrtas are traditionally taught for the night and likewise for the day. Their becoming shorter or longer should be determined according to the rule of proportional calculation (trairāśika).
Narada (teaching in a technical, instructional mode within the Uttara-Bhaga narrative)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: none
It emphasizes that dharmic practice is strengthened by right timing: sacred acts are to be aligned with kāla (time), and the Purāṇa treats time-measurement as a practical support for disciplined religious life.
Bhakti is practiced through daily worship and vows done at proper times; by teaching how day/night muhūrtas are determined, the verse supports accurate scheduling of pūjā, japa, and vrata observances that sustain devotion.
Jyotiṣa/Vedāṅga-style kāla-nirṇaya: it states the standard division (15 muhūrtas each for day and night) and points to trairāśika (rule-of-three proportional computation) to adjust for seasonal variation in day/night length.