Cakradatta (Cikitsasangraha) 49.144

49.144

mṛtpātre lauhapātre vā śanairmṛdvagninā pacet .
paktvā tailavaraṃ hyetanmrakṣayetkauṣṭhikānvraṇān .. 145 ..

In an earthen vessel or an iron vessel, one should cook it slowly over a gentle fire.
Having cooked it, one should smear this supreme oil on leprous ulcers.