After Viśvarūpa was killed, his father, Tvaṣṭā, performed a sacrifice to kill King Indra. Unfortunately, if mantras are chanted irregularly, they yield an opposite result. This happened when Tvaṣṭā performed this yajña. While performing the sacrifice to kill Indra, Tvaṣṭā chanted a mantra to increase Indra’s enemies, but because he chanted the mantra wrong, the sacrifice produced an asura named Vṛtrāsura, of whom Indra was the enemy. When Vṛtrāsura was generated from the sacrifice, his fierce features made the whole world afraid, and his personal effulgence diminished even the power of the demigods. Finding no other means of protection, the demigods began to worship the Supreme Personality of Godhead, the enjoyer of all the results of sacrifice, who is supreme throughout the entire universe. The demigods all worshiped Him because ultimately no one but Him can protect a living entity from fear and danger. Seeking shelter of a demigod instead of worshiping the Supreme Personality of Godhead is compared to trying to cross the ocean by grasping the tail of a dog. A dog can swim, but that does not mean that one can cross the ocean by grasping a dog’s tail.