योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-164, verse-9

स्वप्नेषु कल्पनपुरेषु यथान्यदस्ति चिन्मात्रमच्छगगनं ननु वर्जयित्वा ।
नो किंचनापि न च रूपमरूपकेषु रूपं तथा जगति संप्रति जाग्रदाख्ये ॥ ९ ॥

svapneṣu kalpanapureṣu yathānyadasti cinmātramacchagaganaṃ nanu varjayitvā ,
no kiṃcanāpi na ca rūpamarūpakeṣu rūpaṃ tathā jagati saṃprati jāgradākhye 9

9. As there is nothing in an empty dream or in the aerial castle of imagination except the clear atmosphere of the Intellect; so there is no essence or substance nor form or figure of this world, that we view in our present waking state.