Shiva Purana
तप्तेन वज्रलेपेन शरीरमनुलिप्यते ॥ अधोमुखोर्ध्वपादाश्च तातप्यंते स्म वह्निना ॥ ४४ ॥
They are kept with face down and legs up and scorched in fire. Their bodies are smeared with hot adamantine solution.
english translation
taptena vajralepena zarIramanulipyate ॥ adhomukhordhvapAdAzca tAtapyaMte sma vahninA ॥ 44 ॥
hk transliteration by Sanscript