Deuteronomy 4:20

4:20 You, however, the Lord has selected and brought from Egypt, that iron-smelting furnace, to be his special people as you are today.

Deuteronomy 4:1

The Privileges of the Covenant

4:1 Now, Israel, pay attention to the statutes and ordinances I am about to teach you, so that you might live and go on to enter and take possession of the land that the Lord, the God of your ancestors, is giving you.

Deuteronomy 8:1

The Lord’s Provision in the Desert

8:1 You must keep carefully all these commandments I am giving you today so that you may live, increase in number, and go in and occupy the land that the Lord promised to your ancestors.

Isaiah 48:10

48:10 Look, I have refined you, but not as silver;

I have purified you in the furnace of misery.