Matsyapurana 174.22

174.22

udayāstagacakreṇa meruparvatagāminā
tridivadvāracakreṇa tapatā lokamavyayam //

The Lord Śiva came then riding on a very big bull Indra took his stand in the east, Dharmarâja in the south, Varuṇa in the west and Kuvera in the north The valiant Dikpâlas guarded their respective directions as well as the army of the Devas The God Sun also came in His chariot, drawn by seven swift horses having beautiful reins, moving round the Meru, illumining the Udayâchala and Astâchala mountains, and giving light to all the realms, adorned with many rays, shining with His own lustre, the Lord of the twelve Âdityas thus graced the battlefield—19 23