Hora Sara
उच्चनीचविधिनायुराप्यते यत्र सम्यगधियोगसंभवः। सद्गृहत्वमुपगच्छति लग्नं यत्र चास्तभवनं ग्रहयुक्तम्॥१३॥
The longevity is correctly arrived at by calculating a planet's exact position from its exaltation and debilitation, where there is some benefic conjunction, or when the Lagna is strong and is a benefic house, or when the 7th house is occupied.
english translation
uccanIcavidhinAyurApyate yatra samyagadhiyogasaMbhavaH। sadgRhatvamupagacchati lagnaM yatra cAstabhavanaM grahayuktam॥13॥
hk transliteration by Sanscript