Shiva Purana
असंपूज्य शिवं भस्मरहितश्चान्नभुक् च यः ॥ एतेषां पातकं मे स्यान्नागच्छेयं पुनर्यदि ॥ ६६ ॥
He who does not worship Lord Shiva and eats food without ashes It would be a sin for me if I did not come back.
english translation
asaMpUjya zivaM bhasmarahitazcAnnabhuk ca yaH ॥ eteSAM pAtakaM me syAnnAgaccheyaM punaryadi ॥ 66 ॥
hk transliteration by Sanscript