Meaning: A weakness in apparent strength
Daniel 2:33-34 His legs of iron, his feet part of iron and part of clay.
34Thou sawest till that a stone was cut out without hands, which smote the image upon his feet that were of iron and clay, and brake them to pieces.
Daniel 2:41-42 And whereas thou sawest the feet and toes, part of potters' clay, and part of iron, the kingdom shall be divided; but there shall be in it of the strength of the iron, forasmuch as thou sawest the iron mixed with miry clay.
42And as the toes of the feet were part of iron, and part of clay, so the kingdom shall be partly strong, and partly broken.