योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-42, verse-1

श्रीवसिष्ठ उवाच ।
चित्तवत्कचनं शान्ते यत्तत्तस्मान्न भिद्यते ।
अव्याकृतामलतया क्वाऽतः सर्गादिसंभवः ॥ १ ॥

śrīvasiṣṭha uvāca ,
cittavatkacanaṃ śānte yattattasmānna bhidyate ,
avyākṛtāmalatayā kvā'taḥ sargādisaṃbhavaḥ 1

1. Vasishtha continued:—The mind being as calm and quiet as the Intellect, there can be no difference between them;and it is impossible to assign the creation to the divine mind, in its undeveloped and tranquil state.