Shiva Purana
एकाशनं वा विरतं स्नातं प्रातःकृतक्रियम् ॥ जपंतं प्रणवं देवं ध्यायंतं कृतमंगलम् ॥ २९ ॥
One should eat only one meal or refrain from taking a bath and perform morning rituals He was chanting the oṁkāra and meditating on the Supreme Personality of Godhead.
english translation
ekAzanaM vA virataM snAtaM prAtaHkRtakriyam ॥ japaMtaM praNavaM devaM dhyAyaMtaM kRtamaMgalam ॥ 29 ॥
hk transliteration by Sanscript