शीघ्रगस् तान्य् अथाल्पेन कालेन महताल्पगः। तेषाम् तु परिवर्तेन पौष्णान्ते भगणः स्मृतः ॥
The planet which moves rapidly, requires a short time, to pass the signs (of the Zodiac,) and the planet that moves slowly, passes the signs (of the Zodiac) in a long time. Bhagaṇa means that revolution through the signs (of the Zodiac which a planet makes by passing round) up to the end of the true place of the star called Reváti (ζ Piscium, from which end they set out.)
english translation