Brihat Parashara Hora Shastra
केन्द्रस्थिते विलग्नेशे गुरुशुक्रसमन्विते । ताभ्यां निरीक्षिते वाऽपि पूर्णमायुर्विनिर्दिशेत् ॥ ६१॥
Should Lagn‟s Lord be in a Kendr yuti with, or receiving a Drishti from Guru and Śukr, full life-span will result.
english translation
kendrasthite vilagneze guruzukrasamanvite । tAbhyAM nirIkSite vA'pi pUrNamAyurvinirdizet ॥ 61॥
hk transliteration by Sanscript