'Thighs' in the Bible

This image's head was of fine gold, his breast and his arms of silver, his belly and his thighs of brass,

Then the king's face was changed in him, and his thoughts troubled him; and the joints of his thighs were loosened, and his knees struck one against another.

I lifted up my eyes, and looked, and behold, a man clothed in linen, whose thighs were adorned with pure gold of Uphaz: