Hindu texts Prior to the start of the common era, the Hindu texts were composed orally, then memorized and transmitted orally, from one generation to next, for more than a millennia before they were written down into manuscripts. This verbal tradition of preserving and transmitting Hindu texts, from one generation to next, continued into the modern era. The Vedas are a large body of Hindu texts originating in ancient India, with its Samhita and Brahmanas complete before about 800 BCE. Composed in Vedic Sanskrit hymns, the texts constitute the oldest layer of Sanskrit literature and the oldest scriptures of Hinduism. Hindus consider
Indra the most celebrated Vedic deities. He is also mentioned in ancient Indo-Iranian literature, but with a major inconsistency when contrasted with the Vedas. In the Vedic literature, Indra is a heroic god. In the Avestan (ancient, pre-Islamic Iranian) texts such as "Vd." 10.9, "Dk." 9.3 and "Gbd" 27.6-34.27, Indra – or accurately Andra – is a gigantic demon who opposes truth. In the Vedic texts, Indra kills the archenemy and demon Vritra who threatens mankind. In the Avestan texts, Vritra is not found. Indra is called "vrtrahan-" (literally, "slayer of Vritra demon") in the Vedas, which corresponds to Verethragna of