Proverbs 17:3

3 aThe crucible is for silver, and the furnace is for gold,
band the Lord tests hearts.

Isaiah 31:9

9 cHis rock shall pass away in terror,
and his officers desert the standard in panic,”
declares the Lord, whose dfire is in Zion,
and whose efurnace is in Jerusalem.

Isaiah 48:10

10Behold, I have refined you, fbut not as silver;
gI have tried
Or  I have chosen
you in the furnace of affliction.
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