Dvija (Sanskrit: द्विज) means "twice-born". The concept is premised on the belief that a person is first born physically and at a later date is born for a second time spiritually, usually when he undergoes the rite of passage that initiates him into a school for Vedic studies.[1][2] The term also refers to members of the three varnas in the traditional Hindu social system, or social classes — the Brahmins (priests and teachers), Kshatriyas (warriors), and Vaishyas (farmers, herders and merchants) — whose samskara of the Upanayana initiation was regarded as a second or spiritual birth.[1][2]
The word Dvija is neither found in any Vedas and Upanishads, nor is it found in any Vedanga literature such as the Shrauta-sutras or Grihya-sutras.[3] The word scarcely appears in Dharmasutras literature.[3] Increasing mentions of it appear in Dharmasastras text of mid to late 1st-millennium CE texts. The presence of the word Dvija is a marker that the text is likely a medieval era Indian text.[3]