The battle between Indra and Vritra, described extensively across the Rigveda, is one of the oldest and most repeated myths in the entire Vedic corpus, framed as the event that made the world’s rivers and waters available to living beings in the first place.
A demon who swallowed the world’s water
Vritra, a massive serpent or dragon-like asura, is described as having blocked or swallowed the cosmic waters, holding them captive within his enormous coiled body and causing the earth to suffer under conditions resembling severe, unending drought.
A weapon built specifically for this fight
To defeat Vritra, Indra required the Vajra, a thunderbolt weapon forged from the bones of the sage Dadhichi, who voluntarily gave up his life and his skeleton for the purpose after being asked, recognizing the necessity of the coming battle.
A victory that released the rivers
Indra’s defeat of Vritra using the Vajra caused the imprisoned waters to burst forth and flow freely across the earth, an event the hymns treat as directly responsible for the existence of rivers as a life-sustaining feature of the world. The Indra-Vritra battle became one of the central myths establishing Indra’s identity as a warrior god and rain-bringer, and the story’s basic structure – a hero releasing captured waters by defeating a serpent – reappears in various forms across other ancient Indo-European mythologies, suggesting the myth’s roots run deeper than the Rigveda’s own composition.