Shiva Purana
औपासनाग्निसंधानं समारभ्य सुरक्षितम् । कुंडे वाप्यथ भांडे वा तदजस्रं समीरितम् ५ ।
Householders who have started their Aupāsana rite shall maintain the rite in the sacrificial fire kept in a vessel or pit always.
english translation
aupAsanAgnisaMdhAnaM samArabhya surakSitam । kuMDe vApyatha bhAMDe vA tadajasraM samIritam 5 ।
hk transliteration by Sanscript