Isaiah 1:25

I will also turn My hand against you,

And will ^asmelt away your dross as with lye

And will remove all your alloy.

Malachi 3:3

3 And He will sit as a smelter and purifier of silver, and He will ^apurify the sons of Levi and refine them like gold and silver, so that they may ^bpresent to Yahweh ¹offerings in righteousness.