Shiva Purana
नमः शिवाय मंत्रेणार्चनद्र व्यं च प्रोक्षयेत् । भूरसीति च मंत्रेण क्षेत्रसिद्धिं प्रकारयेत् ११ ।
The material of worship shall be sprinkled with water, chanting the formula “Namaḥ Śivāy[1]” With the mantra “Bhūrasi[2]” etc. the achievement of the sanctity of a holy centre (Kṣetra Siddhi) shall be effected.
english translation
namaH zivAya maMtreNArcanadra vyaM ca prokSayet । bhUrasIti ca maMtreNa kSetrasiddhiM prakArayet 11 ।
hk transliteration by Sanscript