Brihat Parashara Hora Shastra
लग्नसप्तमगे जीवे शुभमात्रयुतेक्षिते । कथितस्यायुषो विप्र कक्ष्यावृद्धिः प्रजायते ॥ ४८॥
Special Rule for Guru. If Guru is in Lagn, or in Yuvati Bhava and receives a Drishti from, or is yuti with only benefics, the class of longevity will increase.
english translation
lagnasaptamage jIve zubhamAtrayutekSite । kathitasyAyuSo vipra kakSyAvRddhiH prajAyate ॥ 48॥
hk transliteration by Sanscript