Shiva Purana
मुखे यस्य शिवनाम सदाशिवशिवेति च । पापानि न स्पृशंत्येव खदिरांगारंकयथा ६ ।
Sins never touch those from whose mouth the names Sadāśiva, Śiva etc. come out for ever, as they do not touch the burning charcoal of the khadira wood.
english translation
mukhe yasya zivanAma sadAzivaziveti ca । pApAni na spRzaMtyeva khadirAMgAraMkayathA 6 ।
hk transliteration by Sanscript