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 ||
Bila penguasa lagna dianugerahi kekuatan, maka usia dikatakan delapan puluh tahun. Jika ia penuh daya dan berada di kendra, serta rumah kedelapan memiliki ukuran kemurnian/kekuatan tiga puluh, maka itu menandakan umur yang penuh.
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.