Shiva Purana
प्रदक्षिणनमस्काराः शिवस्य परमात्मनः । षोडशैरुपचारैश्च कृतपूजा फलप्रदा १४८ ।
The circumambulation and obeisance of Śiva, the great soul and the adoration performed with sixteen Upacāras accord all benefits.
english translation
pradakSiNanamaskArAH zivasya paramAtmanaH । SoDazairupacAraizca kRtapUjA phalapradA 148 ।
hk transliteration by Sanscript