The sky was made to be its yoke; and the clouds, known by the names of Samvartakas and Balahakas, were made its leathern strings. Then also Kalaprishta, Nahusha, Karkotaka and Dhananjaya, as also several other snakes became the chords for binding the manes of those horses. The cardinal points and the subsidiary directions constituted the reins of those horses yoked to that car.