Shiva Purana
येनोपलभ्यते ऽस्माभिस्सकलेनापि निष्कलः ॥ स मूर्त्यात्मा शिवः शैवमूर्तिरित्युपचर्यते ॥ १० ॥
Śiva in the form of the idol, whereby despite its beings Saguṇa the Niṣkala is realised, is called Śaivamūrti only in a figurative use.
english translation
yenopalabhyate 'smAbhissakalenApi niSkalaH ॥ sa mUrtyAtmA zivaH zaivamUrtirityupacaryate ॥ 10 ॥
hk transliteration by Sanscript