Brihat Parashara Hora Shastra
रवेः सिंहे नखांशाश्च त्रिकोणमपरे स्वभम्। उच्चमिन्दोर्वृषे त्र्यंशास्त्रिकोणमपरेंऽशकाः॥ ५१॥
Additional Dignities. In Simh the first 20 degrees are Sūrya‟s Mooltrikon, while the rest is his own Bhava. After the first 3 degrees of exaltation portion in Vrishabh, for Candr, the rest is her Mooltrikon.
english translation
raveH siMhe nakhAMzAzca trikoNamapare svabham। uccamindorvRSe tryaMzAstrikoNamapareM'zakAH॥ 51॥
hk transliteration by Sanscript