Once Mahārāja Ambarīṣa was worshiping the Supreme Personality of Godhead in Vṛndāvana, observing the vow of Dvādaśī. On Dvādaśī, the day after Ekādaśī, when he was about to break his Ekādaśī fast, the great mystic yogī Durvāsā appeared in his house and became his guest. King Ambarīṣa respectfully received Durvāsā Muni, and Durvāsā Muni, after accepting his invitation to eat there, went to bathe in the Yamunā River at noontime. Because he was absorbed in samādhi, he did not come back very soon. Mahārāja Ambarīṣa, however, upon seeing that the time to break the fast was passing, drank a little water, in accordance with the advice of learned brāhmaṇas, just to observe the formality of breaking the fast. By mystic power, Durvāsā Muni could understand that this had happened, and he was very angry. When he returned he began to chastise Mahārāja Ambarīṣa, but he was not satisfied, and finally he created from his hair a demon appearing like the fire of death. The Supreme Personality of Godhead, however, is always the protector of His devotee, and to protect Mahārāja Ambarīṣa, He sent His disc, the Sudarśana cakra, which immediately vanquished the fiery demon and then pursued Durvāsā, who was so envious of Mahārāja Ambarīṣa. Durvāsā fled to Brahmaloka, Śivaloka and all the other higher planets, but he could not protect himself from the wrath of the Sudarśana cakra. Finally he went to the spiritual world and surrendered to Lord Nārāyaṇa, but Lord Nārāyaṇa could not excuse a person who had offended a Vaiṣṇava. To be excused from such an offense, one must submit to the Vaiṣṇava whom he has offended. There is no other way to be excused. Thus Lord Nārāyaṇa advised Durvāsā to return to Mahārāja Ambarīṣa and beg his pardon.