योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-62, verse-33

स्वप्नजन्तुरिव व्योम्नि भाति प्रथमसर्गतः ।
प्रभृत्येव विराडात्मा खे खमेव परस्परे ॥ ३३ ॥

svapnajanturiva vyomni bhāti prathamasargataḥ ,
prabhṛtyeva virāḍātmā khe khameva paraspare 33

33. We have the dreaming man, presented to us in the person of Virat from the very beginning of creation; and this being is situated in open air with its aeriform body, in the shape of the dreamer and dream mixed up together.