स यावदादित्यो दक्षिणत उदेतोत्तरतोऽस्तमेता द्विस्तावत्पश्चादुदेता पुरस्तादस्तमेतादित्यानामेव तावदाधिपत्यंस्वाराज्यं पर्येता ॥ ३.८.४ ॥
In plain words
Twice as long as the sun rises in the south and sets in the north, it rises in the west and sets in the east; and for that long does he attain the sovereignty and self-rule of the Ādityas.