Daniel 2:38-40

38Wherever people live — or wild animals, or birds of the sky — he has handed them over to you and made you ruler over them all. You are the head of gold.

39“After you, there will arise another kingdom, inferior to yours, and then another, a third kingdom, of bronze, which will rule the whole earth.

40A fourth kingdom will be as strong as iron; for iron crushes and shatters everything, and like iron that smashes, it will crush and smash all the others.