Shiva Purana
अप्रज्ञाते जगत्यस्मिन्नेक एव महेश्वरः ॥ उपास्य रजनीं कृत्स्नां परां माहेश्वरीं ततः ॥ २१ ॥
In this unconscious world there is only one Supreme Lord. Then he worshiped the supreme goddess Maheswari for the whole night.
english translation
aprajJAte jagatyasminneka eva mahezvaraH ॥ upAsya rajanIM kRtsnAM parAM mAhezvarIM tataH ॥ 21 ॥
hk transliteration by Sanscript