A Righteous King Chosen to Fill an Empty Throne
Nahusha, a righteous and accomplished king of the lunar dynasty (father of Yayati, whose own story of a curse traded for youth is told elsewhere in this series), came to occupy heaven's throne under unusual circumstances: Indra, having killed the demon Vritra through a method involving deceit and the breaking of a truce, incurred the sin of Brahmahatya (the killing of a Brahmin, since Vritra held that status through his birth), and, overwhelmed by the weight of this sin, went into hiding, abandoning heaven's throne entirely.
With Indra's seat empty and heaven needing a ruler, the gods and sages together selected Nahusha, on the strength of his own considerable righteousness and accumulated merit, to occupy the position temporarily, granting him Indra's authority and, in most tellings, remarkable additional power drawn from the collective austerities of the assembled sages who blessed the arrangement.
Power that outpaced his character
What the story presents as the real danger is not that Nahusha was undeserving of the honour, since his merit had genuinely earned him consideration, but that the sudden scale of absolute power, layered onto a mortal's existing ego, began to work on him in ways his prior righteousness had not prepared him for.
Carried by Sages, and the Demand That Undid Him
As his time in heaven's position continued, Nahusha grew increasingly consumed by pride in his new authority, and one specific desire took hold of him: to have Indra's wife, Shachi, as his own, on the reasoning that he now held Indra's position and its privileges should follow completely, including this.
Shachi, appalled and resistant, sought advice from Brihaspati, who counselled her to stall Nahusha with a delaying request rather than refuse him outright and provoke his anger while he held such concentrated power. She told Nahusha she would come to him once he arrived at her dwelling in a manner befitting his exalted new status - carried in a palanquin borne by the great sages themselves, rather than by ordinary means.
Nahusha agreed, and had a group of eminent rishis, including Agastya, carry him in this manner, an act already dangerously disrespectful given who was being asked to serve as a mortal's palanquin-bearers regardless of his current position. Impatient with the pace of the sages carrying him, Nahusha, in his gathering arrogance, kicked Agastya to urge him to move faster, using the word "sarpa sarpa" (move, move, or crawl, crawl, depending on interpretation) to hurry him along.
Agastya's curse
Agastya, insulted by both the physical kick and the demeaning command directed at a sage of his standing, cursed Nahusha on the spot to become a serpent, using the very word Nahusha had spoken against him, and Nahusha fell from heaven's throne instantly, transformed, his brief reign over the gods ending in the same moment his ambition finally overreached what even his accumulated merit could support.
The Serpent's Later Encounter With His Own Descendant
Nahusha remained in serpent form for a long span afterward, and the story's most notable coda comes generations later in the Mahabharata, during the Pandavas' forest exile, when a great python, revealed to be Nahusha still trapped in this form, captured Bhima and held him in its coils.
When Yudhishthira arrived searching for his brother, the serpent, still possessing the wisdom Nahusha had carried even into this diminished state, engaged him in a philosophical dialogue about the nature of true Brahminhood, dharma, and what actually constitutes nobility, a conversation the text presents at real length. Satisfied with Yudhishthira's answers, particularly his insistence that conduct and character, not birth alone, determine a person's true standing, Nahusha released Bhima, and, freed by the exchange itself, was finally released from his curse and able to leave his serpent body behind for good.
What the whole arc is arguing
Read across its full span, from ascension to curse to eventual release, Nahusha's story treats power and pride as functioning almost independently of a person's prior character - a genuinely righteous king could still be corrupted by sufficiently absolute authority, and the eventual release comes not from further punishment but from a return, forced by circumstance, to exactly the kind of reasoned reflection on dharma that his time on heaven's throne had crowded out. His name survives today primarily as a cautionary reference for the specific danger of power outpacing character, distinct from stories about outright villainy - a warning aimed specifically at the otherwise deserving.
Reader Questions Answered
Why was Nahusha made ruler of heaven in Indra's place?+
Indra went into hiding after incurring the sin of Brahmahatya for killing the demon Vritra deceitfully, leaving heaven's throne empty. The gods and sages selected Nahusha, a righteous mortal king, to occupy the position temporarily on the strength of his own considerable merit and accumulated righteousness.
Why did Agastya curse Nahusha to become a serpent?+
Nahusha, made increasingly arrogant by his temporary heavenly power, had a group of sages including Agastya carry him in a palanquin and kicked Agastya impatiently, shouting the demeaning command "sarpa sarpa" (move, move) to hurry him. Insulted by both the physical assault and the disrespect toward his standing, Agastya cursed him with the same word to become a serpent.
How did Nahusha finally escape the serpent curse?+
Generations later, as a python holding Bhima captive during the Pandavas' forest exile, Nahusha engaged Yudhishthira in a philosophical dialogue about true Brahminhood and dharma. Satisfied by Yudhishthira's insistence that conduct rather than birth determines true nobility, Nahusha released Bhima and was himself finally freed from the curse.
About the author
Anjali Mehta · Editor, M.A. Religious Studies
Anjali is the managing editor for Vandnaa and oversees the festival and vrat coverage. She holds an M.A. in Religious Studies and reviews every published article for accuracy, accessibility, and tradition-fidelity.
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