Surya Siddhanta
ग्रहभुक्तेः फलम् कार्यम् ग्रहवन् मन्दकर्मणि । दोर्ज्यान्तरगुणा भुक्तिस् तत्त्वनेत्रोद्धृता पुनः॥ (२२५)
In the manda operation, find the (first) equation of a planet's diurnal motion from the motion itself, in the same way in which the planet's first equation is found. (Take the difference between the gata and gamya sines which have been found in finding the sine of the first Kendra of the planet); by the difference between the sines (gata and gamya) multiply the (planet's mean) motion (from its apogee) and divide the product by 225.
english translation
grahabhukteH phalam kAryam grahavan mandakarmaNi । dorjyAntaraguNA bhuktis tattvanetroddhRtA punaH॥ (225)
hk transliteration by Sanscript