Surya Siddhanta
स्फुटम् दृक्तुल्यताम् गच्छेद् अयने विषुवद्वये । प्राक् चक्रम् चलितम् हीने छायार्कात् करणागते ॥
According as the Sun's true place found by computation (as stated in the 2nd Chapter) is less or greater than that which is found by observation (i. e. the longitude of the Sun), the circle of asterisms is to the east or west (from its original place) as many degrees as these are in the difference (between the Sun's true place and the longitude).
english translation
sphuTam dRktulyatAm gacched ayane viSuvadvaye । prAk cakram calitam hIne chAyArkAt karaNAgate ॥
hk transliteration by Sanscript