Brihat Parashara Hora Shastra
लग्नाष्टमेशयोर्मध्ये यः खेटः प्रबलो भवेत् । तस्मिन् केन्द्रगते दीर्घ मध्यं पणफरस्थिते ॥ ७१॥
If the stronger among Lagn‟s Lord and Randhr‟s Lord is placed in a Kendr, long life is indicated and, if in a Panaphara, medium life is indicated.
english translation
lagnASTamezayormadhye yaH kheTaH prabalo bhavet । tasmin kendragate dIrgha madhyaM paNapharasthite ॥ 71॥
hk transliteration by Sanscript