Shiva Purana
प्रथमावाहनं तत्र प्रतिष्ठा पूजनं पृथक् । लिंगाकारं समं तत्र सर्वं ज्ञेयं पृथक्पृथक् ६ ।
The first invocation, installation and worship are all separate. Only the shape of the phallic image is the same. Everything else is different.
english translation
prathamAvAhanaM tatra pratiSThA pUjanaM pRthak । liMgAkAraM samaM tatra sarvaM jJeyaM pRthakpRthak 6 ।
hk transliteration by Sanscript