Daniel 2:43
And as you saw the iron mixed with common clay, so they will combine with one another in the seed of men; but they will not merge [for such diverse things or ideologies cannot unite], even as iron does not mix with clay.
Treasury of Scripture Knowledge
Summary
And whereas thou sawest iron mixed with miry clay, they shall mingle themselves with the seed of men: but they shall not cleave one to another, even as iron is not mixed with clay.
General references
Bible References
General references
Daniel 2:33
its legs of iron, its feet partly of iron and partly of clay [pottery].