Shiva Purana
शिवाग्निना तनुं दग्ध्वा शक्तिसौम्या मृतेन यः ॥ प्लावयेद्योगमार्गेण सो ऽमृतत्वाय कल्पते ॥ १९ ॥
He who burns his body with Śaivite fire and drenches it with the nectar of Śakti and Soma attains immortality.
english translation
zivAgninA tanuM dagdhvA zaktisaumyA mRtena yaH ॥ plAvayedyogamArgeNa so 'mRtatvAya kalpate ॥ 19 ॥
hk transliteration by Sanscript