Surya Siddhanta
अर्कबाहुफलाभ्यस्ता ग्रहभुक्तिर् विभाजिता । भचक्रकलिकाभिस् तु लिप्ताः कर्या ग्रहे +अर्कवत् ॥
Multiply the diurnal motion of a planet by the number of minutes contained in the first equation of the Sun, and divide the product by the number of minutes contained in a circle or 21600′: add or subtract the quotient, in minutes, according as the Sun's equation is additive or subtractive, to or from the place of the planet (which is found from the Ahargaṇa at the mean mid-night at Lanká, the result will be the place of the planet at the true mid-night at Lanká.)
english translation
arkabAhuphalAbhyastA grahabhuktir vibhAjitA । bhacakrakalikAbhis tu liptAH karyA grahe +arkavat ॥
hk transliteration by Sanscript