Shiva Purana
केवलं सात्त्विकश्चापि राजसश्चैव तामसः ॥ अविकाररतः पूर्वं ततस्तु समविक्रियः ॥ १२० ॥
They are purely in the mode of goodness and in the mode of passion and ignorance He was first unchanged and then equally transformed.
english translation
kevalaM sAttvikazcApi rAjasazcaiva tAmasaH ॥ avikArarataH pUrvaM tatastu samavikriyaH ॥ 120 ॥
hk transliteration by Sanscript