'Out of the Iron Furnace' in the Bible

But LORD has taken you, and brought you forth out of the iron furnace, out of Egypt, to be to him a people of inheritance, as at this day.

which I commanded your fathers in the day that I brought them forth out of the land of Egypt, out of the iron furnace, saying, Obey my voice, and do them, according to all which I command you, so ye shall be my people, and I will b