Surya Siddhanta
सैव यत्कल्पभगणैर् भक्ता तद्भ्रमणम् भवेत् । कुवासरैर् विभज्याह्नः सर्वेषाम् प्राग्गतिः स्मृता॥
If this be divided by the number of revolutions of any« planet in an iEon (kalpa), the result will be the orbit of that planet : divide this by the number of terrestrial days, and the result is tbe daily eastward motion of them all.
english translation