Shiva Purana
मनुना सौजीव इति देवतान्यासमाचरेत् । असौ योवसर्पतीति चाचरेदपसर्पणम् १८ ।
The Nyāsa of the deity shall be performed with the mantra “Asau Jīva॥ 13॥” etc. The rite of approaching the deity (upasarpaṇa) shall be performed with the mantra “Asau Yovasarpati”॥ 14॥ etc.
english translation
manunA saujIva iti devatAnyAsamAcaret । asau yovasarpatIti cAcaredapasarpaNam 18 ।
hk transliteration by Sanscript