Shiva Purana
अथवा किमिदं चित्रं शर्वभक्तजनेष्वहो॥ स्वयमाविरभूद्रुद्रो ययो रुद्रस्तदर्चितः ॥ २९॥
Or what is this wonderful thing among the devotees of Lord Śiva Rudra himself appeared and was worshiped by him.
english translation
athavA kimidaM citraM zarvabhaktajaneSvaho॥ svayamAvirabhUdrudro yayo rudrastadarcitaH ॥ 29॥
hk transliteration by Sanscript