Jyotiṣa-śāstra Saṅgraha: Threefold Division, Gaṇita Methods, Muhūrta, and Planetary Reckoning
ताभ्यां हीनयुतो मध्यदर्शः कालौ मुखांतगौ । अर्काद्यूना विश्व ईशा नवपंचदशांशकाः ॥ १६५ ॥
tābhyāṃ hīnayuto madhyadarśaḥ kālau mukhāṃtagau | arkādyūnā viśva īśā navapaṃcadaśāṃśakāḥ || 165 ||
その二つによって減じ、また加えると、「中を観る」計算が得られる。時は mukha(始め)と anta(終わり)を備えると知るべし。太陽より以後、宇宙の度量は九分と十五分(aṃśa)として説かれる。
Sanatkumara (teaching Narada in a technical/disciplinary passage)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: none
It frames kāla (time) as a measurable, ordered principle with a beginning and end, supporting disciplined understanding of the cosmos—an aid to viveka (discernment) that underlies Moksha-Dharma.
Indirectly: by teaching accurate reckoning of kāla and cosmic order (often used to time vrata and worship), it supports orderly devotional practice even though the verse itself is technical rather than emotive bhakti.
Vedāṅga Jyotiṣa-style computation: using addition/subtraction to derive a ‘middle’ (madhya) measure and describing divisions (aṃśas) anchored ‘from the Sun onward’ for time/cosmic reckoning.