Brihat Parashara Hora Shastra
अथ विंशतिभागानामधिपा ब्रह्मणोदिताः। क्रियाच्चरे स्थिरे चापान् मृगुन्द्राद् द्विस्वभावके॥ १७॥
Vimshāńś. From Mesh for a Movable Rāśi, from Dhanu for a Fixed Rāśi and from Simh for a Common Rāśi: this is how the calculations of Vimshāńśas (1/20th of a Rāśi, or 1°30‟ each) are to commence. The presiding deities of the 20 Vimshāńśas in an odd Rāśi are, respectively:
english translation
atha viMzatibhAgAnAmadhipA brahmaNoditAH। kriyAccare sthire cApAn mRgundrAd dvisvabhAvake॥ 17॥
hk transliteration by Sanscript