The pilgrims take a bath, worship the deity and give charity; they are also recommended to fast one day. They should go to a place of pilgrimage and stay there at least for three days. The first day is spent fasting, and at night they can drink a little water because water does not break the fast.
The cowherd men, headed by Nanda Mahārāja, spent that night on the bank of the Sarasvatī. They fasted all day and drank a little water at night. But while they were taking rest, a great serpent from the nearby forest appeared before them and hungrily began to swallow up Nanda Mahārāja. Nanda cried out helplessly, “My dear son, Kṛṣṇa, please come and save me from this danger! This serpent is swallowing me!” When Nanda Mahārāja cried for help, all the cowherd men got up and saw what was happening. They immediately took up burning logs and began to beat the snake to kill it. But in spite of being beaten with burning logs, the serpent was not about to give up swallowing Nanda Mahārāja.
At that time Kṛṣṇa appeared on the scene and touched the serpent with His lotus feet. Immediately upon being touched by the lotus feet of Kṛṣṇa, the serpent shed its reptilian body and appeared as a very beautiful demigod named Vidyādhara. His bodily features were so beautiful that he appeared to be worshipable. There was a luster and effulgence emanating from his body, and he was garlanded with a gold necklace. He offered obeisances to Lord Kṛṣṇa and stood before Him with great humility. Kṛṣṇa then asked the demigod, “You appear to be a very nice demigod and to be favored by the goddess of fortune. How is it that you performed such abominable activities that you got the body of a serpent?” The demigod then began to narrate the story of his previous life.
“My dear Lord,” he said, “in my previous life I was named Vidyādhara and was known all over the world for my beauty. Because I was a celebrated personality, I used to travel all over in my airplane. While traveling, I saw a great sage named Aṅgirā. He was very ugly, and because I was very proud of my beauty, I laughed at him. Due to this sinful act, I was condemned by the great sage to assume the form of a serpent.”
One should note here that before being favored by Kṛṣṇa a person is always under the modes of material nature, however elevated he may be materially. Vidyādhara was a materially elevated demigod, and he was very beautiful. He also held a great material position and was able to travel all over by airplane. Yet he was condemned to become a serpent in his next life. Any materially elevated person can be condemned to an abominable species of life if he is not careful. It is a misconception that after reaching the human body one is never degraded. Vidyādhara himself stated that even though he was a demigod he was condemned to become a serpent. But because he was touched by the lotus feet of Kṛṣṇa, he immediately came to Kṛṣṇa consciousness. He admitted, however, that in his previous life he was actually sinful. A Kṛṣṇa conscious person knows that he is always the servant of the servant of Kṛṣṇa; he is most insignificant, and whatever good he does is by the grace of Kṛṣṇa and the spiritual master (CC Madhya 13.80).
The demigod Vidyādhara continued to speak to Śrī Kṛṣṇa. “Because I was very proud of the exquisite beauty of my body,” he said, “I derided the ugly features of the great sage Aṅgirā. He cursed me for my sin, and I became a snake. Now I consider that this curse by the sage was not at all a curse; it was a great benediction for me. Had he not cursed me, I would not have assumed the body of a serpent and would not have been kicked by Your lotus feet and thus freed from all material contamination.”