And your heavens which are over your head shall be bronze, and the earth which is under you shall be iron.
Deuteronomy 28:23
Surrounding context
28:22 The LORD will strike you with consumption, with fever, with inflammation, with severe burning fever, with the sword, with scorching, and with mildew; they shall pursue you until you perish.
28:23 And your heavens which are over your head shall be bronze, and the earth which is under you shall be iron.
28:24 The LORD will change the rain of your land to powder and dust; from the heaven it shall come down on you until you are destroyed.