Shiva Purana

siva.sh/siva-purana/saturda-samhita/15/58

इत्थमग्न्यवतारस्ते वर्णितो मे जनार्दनः ।। नाम्ना गृहपतिस्तात शंकरस्य परात्मनः ।। ५८।।

sanskrit

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