Proverbs 17:3
The fining pot is for silver, and the furnace for gold: but the LORD tries the hearts.
Nave's Topical Index—AKJV

Proverbs 25:4
Take away the dross from the silver, and there shall come forth a vessel for the finer.
Nave's Topical Index—AKJV

Proverbs 26:23
Burning lips and a wicked heart are like a potsherd covered with silver dross.
Nave's Topical Index—AKJV

Ezekiel 22:18-22
Son of man, the house of Israel is to me become dross: all they are brass, and tin, and iron, and lead, in the middle of the furnace; they are even the dross of silver.
Nave's Topical Index—AKJV

Jeremiah 6:29,30
The bellows are burned, the lead is consumed of the fire; the founder melts in vain: for the wicked are not plucked away.
Nave's Topical Index—AKJV

Zechariah 13:9
And I will bring the third part through the fire, and will refine them as silver is refined, and will try them as gold is tried: they shall call on my name, and I will hear them: I will say, It is my people: and they shall say, The LORD is my God.
Nave's Topical Index—AKJV

Malachi 3:3
And he shall sit as a refiner and purifier of silver: and he shall purify the sons of Levi, and purge them as gold and silver, that they may offer to the LORD an offering in righteousness.
Nave's Topical Index—AKJV