Brihat Parashara Hora Shastra
शुभषष्टयंशसंयुक्ता ग्रहाः शुभफलप्रदाः। क्रूरषष्ट्यंशासंयुक्ता नाशयन्ति खचारिणः॥ ४१॥
Grahas in benefic Shashtiāńśas produce auspicious, while the opposite is true in case of Grahas in malefic Shashtiāńśas.
english translation
zubhaSaSTayaMzasaMyuktA grahAH zubhaphalapradAH। krUraSaSTyaMzAsaMyuktA nAzayanti khacAriNaH॥ 41॥
hk transliteration by Sanscript