'Waist' in the Bible

You shall make for them [white] linen undergarments to cover their bare flesh, reaching from the waist to the thighs.

And righteousness will be the belt around His loins,And faithfulness the belt around His waist.

Now upward, from that which appeared to be His waist, I saw something like glowing metal that looked like it was filled with fire all around it; and downward, from that which appeared to be His waist, I saw something like fire; and there was a brightness and a remarkable radiance [like a halo] around Him.

Then I looked, and behold, a likeness [of a man] with the appearance of fire; from His loins downward He was like fire, and from His loins upward He had the appearance of brightness, like gleaming metal (bronze).