Shiva Purana
प्रथमं सद्गुरुं प्राप्य भक्तिभाव समन्वितः ॥ शिवबुद्ध्या करोत्युच्चैः पूजनं स्मरणादिकम् ॥ २६ ॥
The devotee at the outset shall go to a competent preceptor with devout and reverential feelings. He shall worship and serve him considering him Siva.
english translation
prathamaM sadguruM prApya bhaktibhAva samanvitaH ॥ zivabuddhyA karotyuccaiH pUjanaM smaraNAdikam ॥ 26 ॥
hk transliteration by Sanscript