Shiva Purana
आधायाग्निं विधानेन संस्कृत्य च ततः परम् ॥ तत्राराध्य महादेवं होमकर्म समाचरेत् ॥ २ ॥
After setting the fire on the altar according to prescribed rituals There one should worship Lord Mahadeva and perform the sacrificial ritual.
english translation
AdhAyAgniM vidhAnena saMskRtya ca tataH param ॥ tatrArAdhya mahAdevaM homakarma samAcaret ॥ 2 ॥
hk transliteration by Sanscript