In this way, by Lord Nārāyaṇa’s sweet words and by the expansion of His superior illusion, the demon became bewildered, and he actually forgot the power of Lord Śiva and his benediction. He was thus very easily persuaded to put his hand on his own head. As soon as the demon did that, his head cracked, as if struck by a thunderbolt, and he immediately died. The demigods from heaven showered flowers on Lord Nārāyaṇa, praising Him with shouts of “All glories!” and “All thanksgiving!” and they offered their obeisances to the Lord. On the death of Vṛkāsura, all the denizens in the higher planetary systems, namely the demigods, the pitṛs, the Gandharvas and the inhabitants of Janaloka, showered flowers on the Personality of Godhead.
Thus Lord Viṣṇu in the form of a brahmacārī released Lord Śiva from the impending danger and saved the whole situation. Lord Nārāyaṇa then informed Lord Śiva that this demon, Vṛkāsura, was killed as the result of his sinful activities. He was especially sinful and offensive because he wanted to experiment on his own master, Lord Śiva. Lord Nārāyaṇa then told Lord Śiva, “My dear lord, a person who commits an offense to great souls cannot continue to exist. He is vanquished by his own sinful activities, and this is certainly true of this demon, who has committed such an offensive act against you.”
Thus by the grace of the Supreme Personality of Godhead, Nārāyaṇa, who is transcendental to all material qualities, Lord Śiva was saved from being killed by a demon. Anyone who hears this history with faith and devotion is certainly liberated from material entanglement as well as from the clutches of his enemies.