Shiva Purana
इत्थमग्न्यवतारस्ते वर्णितो मे जनार्दनः ॥ नाम्ना गृहपतिस्तात शंकरस्य परात्मनः ॥ ५८॥
Thus, O dear, the incarnation of Śiva as fire has been explained to you. This incarnation of Śiva, the great soul, is famous as Gṛhapati also.
english translation
itthamagnyavatAraste varNito me janArdanaH ॥ nAmnA gRhapatistAta zaMkarasya parAtmanaH ॥ 58॥
hk transliteration by Sanscript