Jyotiṣa-saṅgraha: Varga-vibhāga, Bala-nirṇaya, Garbha-phala, Āyuḥ-gaṇanā
द्विसप्तांशे च मासादिलग्रायुर्जायते स्फुटम् । अशायुषी सलग्नानां खेटानामंशका हृताः ॥ १२९ ॥
dvisaptāṃśe ca māsādilagrāyurjāyate sphuṭam | aśāyuṣī salagnānāṃ kheṭānāmaṃśakā hṛtāḥ || 129 ||
ໃນ Dvi-saptāṁśa (ການແບ່ງ 1/14) ອາຍຸທີ່ກ່ຽວກັບເດືອນ ແລະປັດໃຈອື່ນໆ ພ້ອມທັງລັກນາ (ascendant) ຈະຖືກກໍານົດຢ່າງຊັດເຈນ. ສໍາລັບລັກນາທີ່ບໍ່ໃຫ້ອາຍຸ (aśāyuṣī) ໃຫ້ຫັກອອກສ່ວນ aṁśa ທີ່ຈັດສັນໃຫ້ແກ່ດາວເຄາະ.
Sanatkumara (in instruction to Narada)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: bhayanaka
It shows that the Purana preserves Vedanga knowledge (Jyotisha) as a dharmic tool—life’s duration is treated as a measurable karmic framework, encouraging timely pursuit of dharma and moksha.
Indirectly: by clarifying lifespan calculations, it urges a devotee to prioritize sadhana and remembrance of the Divine within the time available, rather than postponing spiritual practice.
Vedanga Jyotisha: using the Dvi-saptāṁśa divisional scheme to compute month/ascendant-based longevity and applying a correction rule—subtracting planetary portions when the ascendant is classified as aśāyuṣī.