Rudra Yamalam - ch.17
Ananda Bhairavi (Parvati) tells Ananda Bhairavi (Siva)
Atharva veda is the essence of all varnas and is associated with shaktyachara.Samaveda of tamoguna originated from Atharva veda. Yajurveda of Satvaguna originated from Samaveda and Rigveda of rajoguna originated from Yajurveda. Brahma resides within Rigveda.
In Atharva veda reside all the vedas, creatures of earth,water and sky and the maharshis.All the mahavidyas, kulavidya and other branches of knowledge reside within Atharva veda. Being the origin of everything, Atharva veda is the essence of everything. Its body comprises of Brahma, Vishnu and Siva. The kundalini sakti stays in Atharva veda chakra.