Anandakanda 2.5.37

2.5.37

<lohabhasmavidhiḥ (4)>
sthālyāṃ vā lohapātre vā lohadarvyā vicālayan /
pācayettriphalākvāthair dinaṃ lohacūrṇakam //

<Method 4 for iron calx> / Either in an earthen pot or in an iron vessel, stirring with an iron ladle, / one should cook the iron powder for a day with triphalā decoction.