'Themselves' in the Bible

And whereas thou sawest the 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 doth not mingle with clay.

And I Daniel alone saw the vision; and the men that were with me saw not the vision, but a great quaking fell on them, and they fled to hide themselves.

And in those times shall many stand up against the king of the south; and the violent of thy people will exalt themselves to establish the vision; but they shall fall.