'Loins' in the Bible

And all the souls that had come out of the loins of Jacob were seventy souls; and Joseph was in Egypt.

And thus shall ye eat it: your loins shall be girded, your sandals on your feet, and your staff in your hand; and ye shall eat it in haste; it is Jehovah's passover.

And thou shalt make them linen trousers to cover the flesh of nakedness; from the loins even to the hips shall they reach.