Isaiah 48:10

Beloved, think it not strange concerning the fiery trial which is to try you, as though some strange thing happened unto you:

The fining pot is for silver, and the furnace for gold: but the LORD trieth the hearts.

But he knoweth the way that I take: when he hath tried me, I shall come forth as gold.

For thou, O God, hast proved us: thou hast tried us, as silver is tried.

That the trial of your faith, being much more precious than of gold that perisheth, though it be tried with fire, might be found unto praise and honour and glory at the appearing of Jesus Christ:

Therefore thus saith the LORD of hosts, Behold, I will melt them, and try them; for how shall I do for the daughter of my people?

But the LORD hath taken you, and brought you forth out of the iron furnace, even out of Egypt, to be unto him a people of inheritance, as ye are this day.

As many as I love, I rebuke and chasten: be zealous therefore, and repent.

And I will purge out from among you the rebels, and them that transgress against me: I will bring them forth out of the country where they sojourn, and they shall not enter into the land of Israel: and ye shall know that I am the LORD.

For they be thy people, and thine inheritance, which thou broughtest forth out of Egypt, from the midst of the furnace of iron: