Job 28:2
Iron is taken out of the earth, and brass is molten out of the stone.
Cross-references
Deuteronomy 8:9
Parallel
Deuteronomy 8:9 describes the Promised Land as having iron and copper — the same metals Job says are taken from the earth.
Genesis 4:22
Historical context
Genesis 4:22 mentions Tubal-cain as a forger of bronze and iron, connecting to Job 28:2's mention of iron and copper smelting.