Brihat Parashara Hora Shastra
स्वोच्चे शुभं फलं पूर्ण त्रिकोणे पादवर्जितम्। स्वर्क्षेऽर्धं मित्रगेहे तु पादमात्रं प्रकीर्तितम्॥ ५९॥
Ratio of Effects. A Grah in exaltation gives fully good effects, while in Mooltrikon it is bereft of its auspicious effects by one fourth. It is half beneficial in its own Bhava. Its beneficence is one fourth in a friendly Rāśi. In an equal‟s Rāśi one eighth of auspicious disposition is useful.
english translation
svocce zubhaM phalaM pUrNa trikoNe pAdavarjitam। svarkSe'rdhaM mitragehe tu pAdamAtraM prakIrtitam॥ 59॥
hk transliteration by Sanscript