Mahabharata 14.39.22

तमोऽव्यक्तं शिवं नित्यमजं योनिः सनातनःप्रकृतिर्विकारः प्रलयः प्रधानं प्रभवाप्ययौ

tamo'vyaktaṃ śivaṃ nityamajaṃ yoniḥ sanātanaḥprakṛtirvikāraḥ pralayaḥ pradhānaṃ prabhavāpyayau

Our plain-language meaning of this verse is waiting for scholar review.