Matsyapurana 125.7

125.7

dhruvasya manasā yo vai bhramate jyotiṣāṃ gaṇaḥ
vātānīkamayair bandhair dhruve baddhaḥ prasarpati //

Among the fourteen stars is the planetary porpoise (Siśumâra). The son of Uttâmapâda has taken this shape of a sacrificial post (Medhi) in the sky and is known as Dhruva. It revolves and causes the sun, moon and planets to revolve also. The stars, too, follow it in its wheel—like motion. These luminaries revolve owing to the will force of Dhruva being tied to it by the aerial chord. Their separation and union period; rising and setting; disturbances; journey southwards, northward, and in the central region; and eclipse, are directed by Dhruva.—5-9.