Shiva Purana
नन्दीश्वर उवाच॥ इत्युक्त्वा स शिशुः प्रीत्या शिवं मेऽस्त्वित्युदीर्य्य च ॥ विसृज्य तां सुप्रणम्य तपः कर्त्तुं प्रचक्रमे॥ १४॥
Nandīśvara said:— After saying thus with pleasure and repeating “Let there be a welfare”, he bowed to his mother and left her. He began to perform penance.
english translation
nandIzvara uvAca॥ ityuktvA sa zizuH prItyA zivaM me'stvityudIryya ca ॥ visRjya tAM supraNamya tapaH karttuM pracakrame॥ 14॥
hk transliteration by Sanscript