'Loins' in the Bible

Thou therefore gird up thy loins, and arise, and speak unto them all that I command thee: be not dismayed at their faces, lest I confound thee before them.

Thus saith the LORD unto me, Go and get thee a linen girdle, and put it upon thy loins, and put it not in water.

So I got a girdle according to the word of the LORD, and put it on my loins.

Take the girdle that thou hast got, which is upon thy loins, and arise, go to Euphrates, and hide it there in a hole of the rock.

For as the girdle cleaveth to the loins of a man, so have I caused to cleave unto me the whole house of Israel and the whole house of Judah, saith the LORD; that they might be unto me for a people, and for a name, and for a praise, and for a glory: but they would not hear.

Ask ye now, and see whether a man doth travail with child? wherefore do I see every man with his hands on his loins, as a woman in travail, and all faces are turned into paleness?

For every head shall be bald, and every beard clipped: upon all the hands shall be cuttings, and upon the loins sackcloth.