Brihat Parashara Hora Shastra
रूपाधिके विना राशिं भागा द्वयाप्ताश्च दृग् भवेत् । एवं राश्यादिके शेषे शनौ द्रष्टरि भो द्विज ॥ ९॥
Special consideration for Śani‟s Drishtis. O Brahmin, if Śani is the Grah, that gives a Drishti, find out the difference between him and the Grah, that receives the Drishti; if the sum is above 1 Rāśi, multiply the degrees etc. by 2 to get the Drishti value.
english translation
rUpAdhike vinA rAziM bhAgA dvayAptAzca dRg bhavet । evaM rAzyAdike zeSe zanau draSTari bho dvija ॥ 9॥
hk transliteration by Sanscript