Shiva Purana
प्रातः पर्वणि चाप्येवं कृत्वा होमा वसानतः ॥ उपसंहृत्य रुद्राग्निं गृह्णीयाद्भस्म यत्नतः ॥ १९ ॥
On the full moon day also he shall perform similar rites. At the conclusion of the sacrifice the sacred fire shall be extinguished and the ashes gathered assiduously.
english translation
prAtaH parvaNi cApyevaM kRtvA homA vasAnataH ॥ upasaMhRtya rudrAgniM gRhNIyAdbhasma yatnataH ॥ 19 ॥
hk transliteration by Sanscript