Brihat Parashara Hora Shastra
योगहेतौ शनौ कक्ष्याह्रासोऽन्यैर्वृद्धिरुच्यते । न स्वर्क्षतुङ्गगे नो वा पापमात्रयुतेक्षिते ॥ ४७॥
Special Rule for Śani. Should Śani be a contributor, the class of longevity declines. Some advocate contrarily an increase of class in this context. If Śani is in its own Rāśi, or in exaltation, change in class will not occur. Even, if he receives a Drishti from, or is yuti with only a malefic, no change occurs.
english translation
yogahetau zanau kakSyAhrAso'nyairvRddhirucyate । na svarkSatuGgage no vA pApamAtrayutekSite ॥ 47॥
hk transliteration by Sanscript