Devi Upanishad

It is one of the 19 Upanishads attached to the Atharvaveda, and is classified as one of the eight Shakta Upanishads. The Upanishad states that the Goddess is the Brahman (ultimate metaphysical Reality), and from her arise Prakṛti (matter) and Purusha (consciousness). She is bliss and non-bliss, the vedas and what is different from it, the born and the unborn, and all of the universe.