Shiva Purana
सर्वे रुद्रात्मकश्चैव सर्वे रुद्रपरायणाः ॥ तस्मादग्निमुखे यत्तद्धुतं स्यादेव केनचित् ॥ ४२ ॥
All of them are Rudra-atmakas and all of them are devoted to Rudra. Therefore, whatever is offered in the mouth of the fire must be done by someone.
english translation
sarve rudrAtmakazcaiva sarve rudraparAyaNAH ॥ tasmAdagnimukhe yattaddhutaM syAdeva kenacit ॥ 42 ॥
hk transliteration by Sanscript