Mahabharata 12.209.12
प्रसन्नैरिन्द्रियैर्यद्यत्संकल्पयति मानसम्तत्तत्स्वप्नेऽप्युपरते मनोदृष्टिर्निरीक्षते
prasannairindriyairyadyatsaṃkalpayati mānasamtattatsvapne'pyuparate manodṛṣṭirnirīkṣate
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book