Vritra's Jaws and Indra's Escape: The Origin of Yawning in the Mahabharata In the Mahabharata, during the Udyoga Parva, Shalya narrates to Yudhishthira the ancient tale of how yawning came to exist in every living creature. This narration is offered as part of a larger discourse encouraging Yudhishthira toward courage and righteous action, using the example of Indra, the ruler of the Devas, who once faced his greatest trial against the demon Vritra. The Wrath of Tvashtra The story begins with grief and anger. Tvashtra, the celestial architect and craftsman among the Devas, learns that his son Trishira has been slain by Indra. Trishira is described as a soul devoted to austerity, forbearance, and self-mastery, one who had subdued his senses through discipline. Tvashtra, unable to accept this act of violence against his peaceful son, resolves to avenge him. In his sorrow and fury, he declares his intent to create a being capable of destroying Indra himself. The Birth of Vri...