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 3:25

3:25 He answered, “But I see four men, untied and walking around in the midst of the fire! No harm has come to them! And the appearance of the fourth is like that of a god!”