Shiva Purana
तमः सत्त्वगुणावेतौ समत्वेन व्यवस्थितौ ॥ अनुद्रिक्तावनन्तौ तावोतप्रोतौ परस्परम् ॥ १९ ॥
The two have the Guṇas of Tamas and Sattva, remaining on a par with each other. The two without the Guṇas being predominant are mutually interwoven.
english translation
tamaH sattvaguNAvetau samatvena vyavasthitau ॥ anudriktAvanantau tAvotaprotau parasparam ॥ 19 ॥
hk transliteration by Sanscript