奥义书——吠陀传统的哲学核心，阐明梵、真我、知识、行动与解脱的本质。十部主要奥义书，另加精选的毗湿奴派小奥义书。
A short Vaiṣṇava book on Puruṣa being first and all things coming from Him; it gives Nārāyaṇa's eight-syllable mantra and promises union with Him to one who repeats it.