rg-yajuh-sama-atharva-akhyah-the names of the four Vedas; vedah-the Vedas; catvarah-four; uddhrtah-made into separate parts; itihasa-historical records (Mahabharata); puranam ca-and the Puranas; pancamah-the fifth; vedah-the original source of knowledge; ucyate-is said to be.