Shiva Purana
ईशानः शिवरूपश्च गरीयान्प्रथमः स्मृतः ॥ भोक्तारं प्रकृतेः साक्षात्क्षेत्रज्ञमधितिष्ठति ॥ ४०॥
Īśāna form of Śiva is the first and the principal one. It directly occupies and presides over the individual soul, the enjoyer of Prakṛti.
english translation
IzAnaH zivarUpazca garIyAnprathamaH smRtaH ॥ bhoktAraM prakRteH sAkSAtkSetrajJamadhitiSThati ॥ 40॥
hk transliteration by Sanscript