Brihat Parashara Hora Shastra
लग्नाष्टमपकर्मेशमन्दाः केन्द्रत्रिकोणयोः । लाभे वा संस्थितास्तद्वद् दिशेयुर्दीर्घमायुषम् ॥ ६॥
Should the Lords of Lagn, Randhr and Karm Bhava and Śani are all disposed severally in an angle, in a trine, or in Labh Bhava, the subject will live long.
english translation
lagnASTamapakarmezamandAH kendratrikoNayoH । lAbhe vA saMsthitAstadvad dizeyurdIrghamAyuSam ॥ 6॥
hk transliteration by Sanscript