Shiva Purana
एवं समासरूपेण कृत्वा देहात्मशोधनम् ॥ शिवभावमुपागम्य पूजयेत्परमेश्वरम् ॥ २० ॥
Thus he shall succinctly perform the purification of the body and Ātman. Attaining the status of Śiva he shall worship Parameśvara.
english translation
evaM samAsarUpeNa kRtvA dehAtmazodhanam ॥ zivabhAvamupAgamya pUjayetparamezvaram ॥ 20 ॥
hk transliteration by Sanscript