योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-211, verse-3

ब्रह्मैव तदिदं सर्वं निर्नामैवामलं नभः ।
किमप्येवाजमाशान्तमादिमध्यान्तवर्जितम् ॥ ३ ॥

brahmaiva tadidaṃ sarvaṃ nirnāmaivāmalaṃ nabhaḥ ,
kimapyevājamāśāntamādimadhyāntavarjitam 3

3. Know all this to be Brahma itself, and a nameless and unsubstantial void only; it is something unborn and increate, all calm and quiet, and with out its beginning, middle and end.