The earliest use of the word Pancharatra is found in section 7.1.10 of the Taittiriya Samhita, a Vedic text. The section describes a person going through a Pancharatra ritual to become a master of rhetorics. The section 13.6 of the Śatapatha Brāhmaṇa mentions Nārāyaṇa as the primordial divinity who performs this offering. The Narayaniya section of the Mahabharata (XII, 335-351) refers to seven rishis who say the Pancharatra ritual was made consistent with the Vedas. Though the five day ritual is mentioned along with many other sacrifices in the Vedic text, the origins of Pancaratra devotees of Vishnu and their tradition is unclear. The movement merged with the ancient Bhagavata tradition also around Krishna-Vasudeva, and contributed to the development of Vaishnavism.