Jyotiṣa-saṅgraha: Varga-vibhāga, Bala-nirṇaya, Garbha-phala, Āyuḥ-gaṇanā
लग्नाधिपे बलयुतशीत्यब्दं त्वायुरीरितम् । सवीर्ये सत्सु केंद्रेषु त्रिंशच्छुद्धियुतेऽष्टमे ॥ ११४ ॥
lagnādhipe balayutaśītyabdaṃ tvāyurīritam | savīrye satsu keṃdreṣu triṃśacchuddhiyute'ṣṭame || 114 ||
当上升宫主星具足力量时,寿命被说为八十年。若其旺盛而居于善良的角宫,并且第八宫具三十之清净/强度之量,则示现此圆满寿数。
Sanatkumara (teaching Narada in a Vedanga/Jyotisha context)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: none
It frames Jyotiṣa as a Vedāṅga tool: by understanding longevity indicators (āyurdaya), one is urged to prioritize dharma and mokṣa-oriented living within the known limits of human life.
Indirectly: by indicating a stable, full lifespan when the lagna lord and key houses are strong, it supports the idea of using favorable embodied life for sustained sādhana—especially steady devotion and disciplined practice.
Vedāṅga Jyotiṣa—specifically āyurdaya calculation: strength of the lagna lord, kendra placement, and an eighth-house strength/purity metric (triṃśacchuddhi) used to judge the span of life.