Shiva Purana
निर्मितानुगुणाः कार्याः पुरश्चरणपूर्विकाः ॥ शिवानले च विहते पुनस्सन्धानमाचरेत् ॥ १६ ॥
They should be built in accordance with the preceding steps. When the fire of Shiva is destroyed one should perform the sandhana again.
english translation
nirmitAnuguNAH kAryAH purazcaraNapUrvikAH ॥ zivAnale ca vihate punassandhAnamAcaret ॥ 16 ॥
hk transliteration by Sanscript