1 Peter 1:7

that the genuineness of your faith--a thing far more precious than gold, which is perishable, yet has to be tested by fire--may win praise and glory and honour at the Appearing of Jesus Christ.

1 Peter 4:12

Dear friends, do not be astonished at the fiery trials that you are passing through, to test you, as though something strange were happening to you.

Treasury of Scripture Knowledge

Summary

The bellows are burned, the lead is consumed of the fire; the founder melteth in vain: for the wicked are not plucked away.

Bible References

The founder

1 Peter 1:7
that the genuineness of your faith--a thing far more precious than gold, which is perishable, yet has to be tested by fire--may win praise and glory and honour at the Appearing of Jesus Christ.
1 Peter 4:12
Dear friends, do not be astonished at the fiery trials that you are passing through, to test you, as though something strange were happening to you.