Daniel 2:40

2:40 Then there will be a fourth kingdom, one strong like iron. Just like iron breaks in pieces and shatters everything, and as iron breaks in pieces all of these metals, so it will break in pieces and crush the others.

Daniel 8:22

8:22 The horn that was broken and in whose place there arose four others stands for four kingdoms that will arise from his nation, though they will not have his strength.