योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-167, verse-18

वस्तुतस्त्वस्ति न स्वप्नो न जाग्रन्न सुषुप्तता ।
न तुर्यं न ततोऽतीतं सर्वं शान्तं परं नभः ॥ १८ ॥

vastutastvasti na svapno na jāgranna suṣuptatā ,
na turyaṃ na tato'tītaṃ sarvaṃ śāntaṃ paraṃ nabhaḥ 18

18. But in reality none of these quadruple states, belongs either to the Divine or the living soul, which is always tranquil, and which is of the nature of an indefinite void.