Matsyapurana 125.47

125.47

gāyatrī caiva triṣṭupca jagatyanuṣṭuptathaiva ca
paṅktiśca bṛhatī caiva uṣṇigeva tu saptamam //

Night is its fender; Dharma is the high banner; the yugas of the axle and pins, the kalâs (parts) which carry the ârtas (?) [This line seems to be a corrupt reading]. Kuṣṭhâs are the nostrils of the horses; moments (kṣaṇâs) are their row of teeth; Nimesa is the (anukarṣa) floor; Kâla, the pole (Iṣâ). Artha and Kâma are the pins of the yoke and axle. The vedic metres are the seven horses that like the air swiftly glide with the chariot. Gâyatrî, Triṣṭupa, Jagati, Anastupa, Pankti, Vrihatî, Usnik the seventh.—44-47.