The tale of the descent of the Ganges, known as the Ganga Avatarana, is one of the most profound and spiritually significant narratives in Hindu mythology. Its origins lie deep in the history of the Solar Dynasty, specifically starting with King Sagara, a powerful ruler of Ayodhya. King Sagara, in an effort to assert his dominance and ensure the prosperity of his kingdom, decided to perform the Ashvamedha Yagna, the Great Horse Sacrifice. According to the ritual, a consecrated horse was released to wander for a year; any land it crossed would be claimed by the king unless he was challenged by a rival. To protect the horse and ensure the ritual’s success, Sagara sent his sixty thousand sons to follow the animal across the world. However, the god Indra, fearing the growing power of King Sagara and the potential for the king to eventually challenge the heavens, decided to intervene. Indra stole the horse and hid it deep within the subterranean realm of Patala, tethering it near the hermitage of the great sage Kapila Muni, who was at that time immersed in deep, silent meditation.
When the sixty thousand sons of Sagara reached the underworld and discovered the horse standing next to the sage, they mistakenly believed that Kapila Muni was the thief. In their arrogance and frustration, they began to shout at and insult the holy man, eventually preparing to attack him. The disturbance broke the sage's profound meditation. As Kapila Muni opened his eyes, the concentrated spiritual fire of his penance flashed outward, instantly reducing all sixty thousand princes to heaps of ash. Because they died in such a state of dishonor and without the proper funeral rites, their souls remained trapped in the mortal plane as restless spirits, unable to ascend to the heavens or find peace. Generations passed, and the weight of this ancestral tragedy hung heavily over the Ikshvaku lineage. It was said that only the waters of the celestial river Ganga, which then flowed only in the heavens, could wash away the sins of the princes and liberate their souls from the ashes.
Finally, the task fell to Bhagiratha, a descendant of Sagara who possessed an iron will and a heart filled with devotion. Realizing that the survival of his lineage’s spiritual health depended on the purification of his ancestors, Bhagiratha abdicated his throne and retreated to the high Himalayas. For years, he lived as an ascetic, practicing 'Tapasya'—intense spiritual penance. He stood on one leg, surrounded by five fires in the heat of summer, and remained exposed to the biting frost of the mountain winters. His devotion was so absolute that it eventually moved Lord Brahma, the Creator. Brahma appeared before Bhagiratha and granted him a boon. Bhagiratha asked for the goddess Ganga to descend to Earth to wash over the ashes of his kin. Brahma agreed, but he warned the king of a grave danger: Ganga was a powerful, torrential force. If she were to fall directly from the heavens to the Earth, the impact would be so violent that it would shatter the very foundations of the world and flood the terrestrial realms into oblivion. Brahma advised Bhagiratha to seek the help of Lord Shiva, the only being capable of withstanding the impact of Ganga’s descent.
Bhagiratha then began another period of intense meditation, this time focusing his prayers on Lord Shiva, the Destroyer and Protector. Pleased by the king's selfless determination, Shiva agreed to help. When the time for the descent arrived, Ganga, who was somewhat proud of her status as a celestial river and the daughter of the mountain king Himavan, decided she would sweep Shiva away with her current as she fell. She plunged from the heights of heaven with a roar that shook the cosmos. However, Shiva was aware of her pride. As the massive volume of water cascaded toward the Earth, Shiva stood firm and spread his vast, matted locks of hair (his Jata). He caught the entire river in his hair, trapping her within the intricate, infinite tangles of his curls. Ganga searched for an exit, but she was lost in the labyrinth of Shiva’s tresses. She could not find her way out, and her pride was humbled by the supreme god's power.
Seeing that the river was now trapped and that the Earth remained dry, Bhagiratha once again prayed to Shiva to release her. Shiva, satisfied that Ganga’s ego had been checked, allowed the river to trickle out of his hair in seven distinct streams. One of these streams followed the chariot of Bhagiratha as he led the way across the Indian subcontinent. The path was not without obstacles. At one point, the rushing waters of Ganga flooded the sacrificial grounds of the sage Jahnu. In his anger, the sage swallowed the entire river. Bhagiratha had to plead with the sage, explaining the holy mission. Softened by the king's sincerity, Jahnu released the river through his ear, leading to Ganga being known also as Jahnavi. Finally, Bhagiratha led the river to the ocean and then down into the depths of the underworld. As the holy waters of the Ganges touched the mounds of ash that were once the sixty thousand sons of Sagara, their souls were instantly purified. They were liberated from their ghostly existence and ascended to the heavens in a glorious display of divine grace.