Shiva Purana
अनुगृह्य महामंत्रतात्पर्यम्परमेश्वरः ॥ पूर्णोहं भावनारूपः शंभुर स्मीति निश्चलम् ॥ २९ ॥
The Supreme Lord graciously chanted the great mantra I am complete and I am Shambhu in the form of emotion and I am unmoved.
english translation
anugRhya mahAmaMtratAtparyamparamezvaraH ॥ pUrNohaM bhAvanArUpaH zaMbhura smIti nizcalam ॥ 29 ॥
hk transliteration by Sanscript