Deuteronomy 4:20
But the LORD has taken you, and brought you forth out of the iron furnace, even out of Egypt, to be to him a people of inheritance, as you are this day.
Torrey's Topical Textbook—AKJV

Psalm 107:10
Such as sit in darkness and in the shadow of death, being bound in affliction and iron;
Torrey's Topical Textbook—AKJV