'Miry' in the Bible

He brought me up also out of a horrible pit, out of the miry clay; And he set my feet upon a rock, and established my goings.

But the miry places thereof, and the marshes thereof, shall not be healed; they shall be given up to salt.

And whereas thou sawest the feet and toes, part of potters clay, and part of iron, it shall be a divided kingdom; but there shall be in it of the strength of the iron, forasmuch as thou sawest the iron mixed with miry clay.

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.