Iron: First Recorded Use of Furnace
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Deuteronomy 4:20
Yet the LORD has taken you and brought you out of the iron furnace, out of Egypt, to be the people of His inheritance, as you are today.
1 Kings 8:51
For they are Your people and Your inheritance; You brought them out of Egypt, out of the furnace for iron.
Jeremiah 11:4
which I commanded your forefathers when I brought them out of the land of Egypt, out of the iron furnace, saying, ‘Obey Me, and do everything I command you, and you will be My people, and I will be your God.’