Hinduism
The Mandukya Upanishad refers to the Self having four "feet" or states of consciousness. These are: waking, dreaming, dreamless sleep, and the transcendent (Turiya). Each of these is associated with both an individual state of consciousness and a cosmic state. Dreamless sleep corresponds to prajna. In Advaita Vedanta, this is associated with the Anandamaya kosha or "sheath" (kosha) made of bliss, and with the causal principle or causal body (karana sarira).
Read more about this topic: Causal Body