Ezekiel 24:10-12

New International Version - UK

¹⁰ So heap on the wood
    and kindle the fire.
Cook the meat well,
    mixing in the spices;
    and let the bones be charred.
¹¹ Then set the empty pot on the coals
    till it becomes hot and its copper glows,
so that its impurities may be melted
    and its deposit burned away.
¹² It has frustrated all efforts;
    its heavy deposit has not been removed,
    not even by fire.