Rajasuya (Imperial Sacrifice or the king's inauguration sacrifice) is a Śrauta ritual of the Vedic religion. It is a consecration of a king.
The Rajasuya is associated with the consecration of a king is prescribed as a means to establish a king's sovereignty. It is described in the Taittiriya corpus, including Apastamba Srauta Sutra 18.8–25.22. It involves soma pressing, a chariot drive, the king shooting arrows from his bow, and a brief "cattle raid". The newly anointed king seizes cattle belonging to his relative, and then gives part of his property to that relative. There is a telling of the tale of Shunahshepa, a boy who was nearly sacrificed to Varuna on behalf of the sonless king Harishchandra. Also included is a game of throwing dice with the Adhvaryu priest in which the king wins a cow, by which the king is enthroned and the cosmos is regenerated.