The refining pot is for silver and the furnace for gold,
(A)But the Lord tests the hearts.

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The crucible for silver and the furnace for gold,(A)
    but the Lord tests the heart.(B)

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10 Behold, (A)I have refined you, but not as silver;
I have tested you in the (B)furnace of affliction.

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10 See, I have refined(A) you, though not as silver;
    I have tested(B) you in the furnace(C) of affliction.

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