The Vishnu Purana
Chapters
The Vishnu Purana: Book IV: Chapter XX

In the kingdom over which Śántanu ruled there was no rain for twelve years. Apprehensive that the country would become a desert, the king assembled the Brahmans, and asked them why no rain fell, and what fault he had committed. They told him that he was as it were a younger brother married before an elder, for he was in the enjoyment of the earth, which was the right of his elder brother Devápi. "What then am I to do?" said the Rájá: to which they replied, "Until the gods shall be displeased with Devápi, by his declining from the path of righteousness, the kingdom is his, and to him therefore you should resign it." When the minister of the king, Asmarisárin, heard this, he collected a number of ascetics who taught doctrines opposed to those of the Vedas, and sent them into the forest; where meeting with Devápi, they perverted the understanding of the simple-minded prince, and led him to adopt heretical notions. In the meantime, Śántanu being much distressed to think that he had been guilty of the offence intimated by the Brahmans, sent them before him into the woods, and then proceeded thither himself, to restore the kingdom to his elder brother. When the Brahmans arrived at the hermitage of Devápi, they informed him, that, according to the doctrines of the Vedas, succession to a kingdom was the right of the elder brother: but he entered into discussion with them, and in various ways advanced arguments which had the defect of being contrary to the precepts of the Vedas. When the Brahmans heard this, they turned to Śántanu, and said, "Come hither, Rájá; you need give yourself no further trouble in this matter; the dearth is at an end: this man is fallen from his state, for he has uttered words of disrespect to the authority of the eternal, untreated Veda; and when the elder brother is degraded, there is no sin in the prior espousals of his junior." Śántanu thereupon returned to his capital, and administered the government as before; and his elder brother Devápi being degraded from his caste by repeating doctrines contrary to the Vedas, Indra poured down abundant rain, which was followed by plentiful harvests 2.

The son of Báhlíka was Somadatta, who had three sons, Bhúri, Bhúriśravas, and Śala 3.