Malachi 3:2-3
But who can endure the day of His coming? And who can stand when He appears? For He will be like a refiner’s fire, like a launderer’s soap. / And He will sit as a refiner and purifier of silver; He will purify the sons of Levi and refine them like gold and silver. Then they will present offerings to the LORD in righteousness.

Isaiah 1:22-25
Your silver has become dross; your fine wine is diluted with water. / Your rulers are rebels, friends of thieves. They all love bribes and chasing after rewards. They do not defend the fatherless, and the plea of the widow never comes before them. / Therefore the Lord GOD of Hosts, the Mighty One of Israel, declares: “Ah, I will be relieved of My foes and avenge Myself on My enemies. ...

Ezekiel 22:18-22
“Son of man, the house of Israel has become dross to Me. All of them are copper, tin, iron, and lead inside the furnace; they are but the dross of silver. / Therefore this is what the Lord GOD says: ‘Because all of you have become dross, behold, I will gather you into Jerusalem. / Just as one gathers silver, copper, iron, lead, and tin into the furnace to melt with a fiery blast, so I will gather you in My anger and wrath, leave you there, and melt you. ...

Proverbs 17:3
A crucible for silver and a furnace for gold, but the LORD is the tester of hearts.

Zechariah 13:9
This third I will bring through the fire; I will refine them like silver and test them like gold. 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 our God.’”

1 Peter 1:6-7
In this you greatly rejoice, though now for a little while you may have had to suffer grief in various trials / so that the proven character of your faith—more precious than gold, which perishes even though refined by fire—may result in praise, glory, and honor at the revelation of Jesus Christ.

Psalm 12:6
The words of the LORD are flawless, like silver refined in a furnace, like gold purified sevenfold.

Isaiah 48:10
See, I have refined you, but not as silver; I have tested you in the furnace of affliction.

1 Corinthians 3:12-15
If anyone builds on this foundation using gold, silver, precious stones, wood, hay, or straw, / his workmanship will be evident, because the Day will bring it to light. It will be revealed with fire, and the fire will prove the quality of each man’s work. / If what he has built survives, he will receive a reward. ...

Job 23:10
Yet He knows the way I have taken; when He has tested me, I will come forth as gold.

Revelation 3:18
I counsel you to buy from Me gold refined by fire so that you may become rich, white garments so that you may be clothed and your shameful nakedness not exposed, and salve to anoint your eyes so that you may see.

Proverbs 25:4
Remove the dross from the silver, and a vessel for a silversmith will come forth.

2 Timothy 2:20-21
A large house contains not only vessels of gold and silver, but also of wood and clay. Some indeed are for honorable use, but others are for common use. / So if anyone cleanses himself of what is unfit, he will be a vessel for honor: sanctified, useful to the Master, and prepared for every good work.

Matthew 3:12
His winnowing fork is in His hand to clear His threshing floor and to gather His wheat into the barn; but He will burn up the chaff with unquenchable fire.”

Daniel 12:10
Many will be purified, made spotless, and refined, but the wicked will continue to act wickedly. None of the wicked will understand, but the wise will understand.