'Refine' in the Bible

“Surely there is a mine for silverAnd a place where they refine gold.

Therefore thus says the Lord of hosts,“Behold, I will refine them and assay them;For what else can I do, because of the daughter of My people?

Some of those who have insight will fall, in order to refine, purge and make them pure until the end time; because it is still to come at the appointed time.

“And I will bring the third part through the fire,Refine them as silver is refined,And test them as gold is tested.They will call on My name,And I will answer them;I will say, ‘They are My people,’And they will say, ‘The Lord is my God.’”

He will sit as a smelter and purifier of silver, and He will purify the sons of Levi and refine them like gold and silver, so that they may present to the Lord offerings in righteousness.