Daniel 2:41-43 NIV

[41] 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. [42] As the toes were partly iron and partly clay, so this kingdom will be partly strong and partly brittle. [43] 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.