Finally, there will be a fourth kingdom, strong as iron--for iron breaks and smashes everything--and as iron breaks things to pieces, so it will crush and break all the others.1
References for Daniel 2:40
Just as you saw that the feet and toes were partly of baked clay and partly of iron, so this will be a divided kingdom; yet it will have some of the strength of iron in it, even as you saw iron mixed with clay.
As the toes were partly iron and partly clay, so this kingdom will be partly strong and partly brittle.
And just as you saw the iron mixed with baked clay, so the people will be a mixture and will not remain united, any more than iron mixes with clay.
"In the time of those kings, the God of heaven will set up a kingdom that will never be destroyed, nor will it be left to another people. It will crush2 all those kingdoms3 and bring them to an end, but it will itself endure forever.4
References for Daniel 2:44
This is the meaning of the vision of the rock5 cut out of a mountain, but not by human hands6--a rock that broke the iron, the bronze, the clay, the silver and the gold to pieces. "The great God has shown the king what will take place in the future.7 The dream is true8 and the interpretation is trustworthy."
References for Daniel 2:45