Shiva Purana
द्विराचम्य समादाय भस्म सद्यादिमंत्रतः ॥ उद्धूलनादिक्रमतो विधार्य्याऽथ मुनीश्वरः ॥ ८॥
After washing himself twice he collected the ashes and chanted the mantra Sadya and others. Then the sage should be placed in the order of lifting and so on.
english translation
dvirAcamya samAdAya bhasma sadyAdimaMtrataH ॥ uddhUlanAdikramato vidhAryyA'tha munIzvaraH ॥ 8॥
hk transliteration by Sanscript