Ezekiel 24:11-13

MSB(i) 11 Set the empty pot on its coals until it becomes hot and its copper glows. Then its impurity will melt within; its rust will be consumed. 12 It has frustrated every effort; its thick rust has not been removed, even by the fire. 13 Because of the indecency of your uncleanness I tried to cleanse you, but you would not be purified from your filthiness. You will not be pure again until My wrath against you has subsided.