Vishnupurana 1.17.39

1.17.39

sa tvāsaktamatiḥ kṛṣṇe daśyamāno mahoragaiḥ /
na vivedātmano gātraṃ tatsmṛtyāhlādasusthitaḥ //

Hirańyakaśipu, highly exasperated, commanded the serpents to fall upon his disobedient and insane son, and bite him to death with their envenomed fangs: and thereupon the great snakes Kuhaka, Takshaka, and Andhaka, charged with fatal poison, bit the prince in every part of his body; but he, with thoughts immovably fixed on Krishńa, felt no pain from their wounds, being immersed in rapturous recollections of that divinity. Then the snakes cried to the king, and said, "Our fangs are broken; our jewelled crests are burst; there is fever in our, hoods, and fear in our hearts; but the skin of the youth is still unscathed: have recourse, monarch of the Daityas, to some other expedient." "Ho, elephants of the skies!" exclaimed the demon; "unite your tusks, and destroy this deserter from his father, and conspirer with my foes. It is thus that often our progeny are our destruction, as fire consumes the wood from which it springs." The young prince was then assailed by the elephants of the skies, as vast as mountain peaks; cast down upon the earth, and trampled on, and gored by their tusks: but he continued to call to mind Govinda, and the tusks of the elephants were blunted against his breast. "Behold," he said to his father, "the tusks of the elephants, as hard as adamant, are blunted; but this is not by any strength of mine: calling upon Janárddana is my defence against such fearful affliction."