Proverbs 25:4
Take away the dross from the silver, and there cometh forth a vessel for the refiner:
Proverbs 17:3
The fining-pot is for silver, and the furnace for gold; but Jehovah trieth the hearts.
Isaiah 1:25-27
And I will turn my hand upon thee, and will thoroughly purge away thy dross, and take away all thine alloy;
2 Timothy 2:20-21
But in a great house there are not only gold and silver vessels, but also wooden and earthen; and some to honour, and some to dishonour.
Ezekiel 22:18
Son of man, the house of Israel is become dross to me: they are all copper, and tin, and iron, and lead, in the midst of the furnace: they are become the dross of silver.
Malachi 3:2-3
But who shall endure the day of his coming? and who shall stand when he appeareth? For he will be like a refiner's fire, and like fullers' lye.
1 Peter 1:7
that the proving of your faith, much more precious than of gold which perishes, though it be proved by fire, be found to praise and glory and honour in the revelation of Jesus Christ: