Proverbs 25:4
Take away the dross from the silver, and the smith has material for a vessel;
Proverbs 17:3
The crucible is for silver, and the furnace is for gold, and the LORD tests hearts.
Isaiah 1:25-27
I will turn my hand against you and will smelt away your dross as with lye and remove all your alloy.
2 Timothy 2:20-21
Now in a great house there are not only vessels of gold and silver but also of wood and clay, some for honorable use, some for dishonorable.
Ezekiel 22:18
"Son of man, the house of Israel has become dross to me; all of them are bronze and tin and iron and lead in the furnace; they are dross of silver.
Malachi 3:2-3
But who can endure the day of his coming, and who can stand when he appears? For he is like a refiner's fire and like fullers' soap.
1 Peter 1:7
so that the tested genuineness of your faith--more precious than gold that perishes though it is tested by fire--may be found to result in praise and glory and honor at the revelation of Jesus Christ.