Mbh 12.275.3c

I have now mentioned to thee the names of all the organs of knowledge and of action, and all the attributes of the five (primal) essences.[1316] When in consequence of the organs being fatigued, they cease to perform their respective functions, the owner of those organs, because of their suspension, is said to sleep. If, when the functions of these organs are suspended, the functions of the mind do not cease, but on the other hand the mind continues to concern itself with its objects, the condition of consciousness is called Dream. During wakefulness there are three states of the mind, viz., that connected with Goodness, that with Passion, and that with Darkness. In dream also the mind becomes concerned with the same three states. Those very states, when they appear in dreams, connected with pleasurable actions, come to be regarded with applause. Happiness, success, knowledge, and absence of attachment are the indications of (the wakeful man in whom is present) the attribute of Goodness. Whatever states (of Goodness, Passion, or Darkness) are experienced by living creatures, as exhibited in acts, during their hours of Wakefulness, reappear in memory during their hours of sleep when they dream. The passage of our notions as they exist during wakefulness into those of dreams, and that of notions as they exist in dreams into those of wakefulness, become directly apprehensible in that state of consciousness which is called dreamless slumber. That is eternal, and that is desirable.[1317] There are five organs of knowledge, and five of actions; with muscular power, mind, understanding, and Chitta, and with also the three attributes of Sattwa, Rajas, and Tamas, the tale, it has been said, comes up to seventeen. The eighteenth in the enumeration is he who owneth the body, Indeed, he who lives in this body is eternal. All those seventeen (with Avidya or Ignorance making eighteen), dwelling in the body, exist attached to him who owns the body.