Sanskrit verses with English translation from Maharishi Parasara. Read the full classical treatise on AstroFusion Learning.
निसर्गायुर्जीवदया नाम्ना ख्याता सनातनी। ग्रहबलेन विज्ञाय आयुः स्यादुपपादितम्॥
nisargāyurjīvadayā nāmnā khyātā sanātanī | grahabalena vijñāya āyuḥ syādupapāditam ||
Nisargayu and Jivadaya are the ancient named methods; ascertaining through planetary strength, the calculated longevity is established.
लग्ने दशमगे चन्द्रे बा यो ग्रहः परमबलः। तस्य बर्षप्रमाणेन निसर्गायुः प्रकीर्तितः॥
lagne daśamage candre vā yo grahaḥ paramabalaḥ | tasya varṣapramāṇena nisargāyuḥ prakīrtitaḥ ||
Whichever planet is of the highest strength in the lagna, the tenth house, or the Moon's lagna — by that planet's measure of years the Nisargayu (natural span) is proclaimed.
बलिनः शुभग्रहास्तु आयुर्बृद्धिं प्रकुर्बते। पापा बलबन्तो ह्रासं जीबदयां विशोधयेत्॥
balinaḥ śubhagrahāstu āyurvṛddhiṃ prakurvate | pāpā balavanto hrāsaṃ jīvadayāṃ viśodhayet ||
Strong benefic planets certainly increase the life-span, while powerful malefics diminish it; thereby the Jivadaya (surviving span) should be rectified.