Mbh 13.160.2c

Assembled together the high-souled deities addressed him, saying, 'O Rudra, the Asuras threaten to exert their destructive influence in all acts! Do thou slay the Daityas and destroy their city for the protection of the three worlds, O giver of honours!' Thus addressed by them, he replied, saying, 'So be it!' and then made Vishnu his excellent shaft-head. He made the deity of fire his shaft-reed, and Surya's son Yama the wings of that shaft. He made the Vedas his bow and the goddess Savitri his excellent bow-string. And he made the Grandsire Brahma his charioteer. Applying all these, he pierced the triple city of the Asuras with that shaft of his, consisting of three Parvans and three Salyas.[617] Indeed, O Bharata, the Asuras with their cities, were all burnt by Rudra with that shaft of his whose complexion was like that of the sun and whose energy resembled that of the fire which appears at the end of the Yuga for consuming all things. Beholding that Mahadeva changed into a child with five locks of hair lying on the lap of Parvati, the latter asked the deities as to who he was. Seeing the child, Sakra became suddenly filled with jealousy and wrath and resolved to kill him with his thunder. The child, however, paralysed the arm, looking like a mace of iron, of Indra with the thunderbolt in it. The deities all became stupefied, and they could not understand that the child was the Lord of universe. Verily, all of them along with the very Regents of the world, found their intellects stupefied in the matter of that child who was none else than the Supreme Being. Then the illustrious Grandsire Brahma, reflecting with the aid of his penances, found out that that child was the foremost of all Beings, the lord of Uma, Mahadeva of immeasurable prowess. He then praised the Lord. The deities also began to hymn the praises of both Uma and Rudra. The arm (which had been paralysed) of the slayer of Vala then became restored to its former state.