Jyotiṣa-śāstra Saṅgraha: Threefold Division, Gaṇita Methods, Muhūrta, and Planetary Reckoning
विश्वघ्नलंबनकलाढ्योनस्तु तिथिवद्यगुः । शरोनोलंबनषडघ्ने तल्लवाढ्योनवित्रिभात् ॥ १६१ ॥
viśvaghnalaṃbanakalāḍhyonastu tithivadyaguḥ | śaronolaṃbanaṣaḍaghne tallavāḍhyonavitribhāt || 161 ||
ពេលយកសំណល់មកបន្ថែម «កលា» (នាទី) ហើយកែតម្រូវដោយ «លំបណ» (សមីការកែសម្រួល) នោះបាន «ទីថិ»។ ហើយពេលយកសំណល់នោះគុណដោយ «ឆដ-អឃ្ន» (គុណប្រាំមួយ) កែដោយលំបណ ហើយបន្ថែម «លវ» តាមសមមូល លទ្ធផលមិនឆ្លងផុតពី «ត្រីភាគ» ត្រឹមត្រូវឡើយ។
Narada (teaching in a technical/ritual-calendar context to the Sanatkumara tradition)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: adbhuta
It emphasizes that dharma-based observances depend on correct sacred time (kāla); accurate tithi computation safeguards the purity of vrata, pūjā, and meritorious acts.
By ensuring the correct tithi and subdivisions of time, a devotee performs worship and vows at their proper moments, aligning bhakti-practice with scriptural timing (śāstra-kāla).
Jyotiṣa Vedāṅga: it references computational steps using units like kalā and lava and corrections like laṃbana to determine tithi accurately for ritual scheduling.