'Loins' in the Bible

David said to Abishai and to all his servants, "Look, my son who came out of my loins [is] seeking my life. Now {as far as} [this] Benjaminite, leave him alone and let him curse, for Yahweh has spoken to him.

When they were at the great stone which is in Gibeon, Amasa went before them. And Joab's garment that he had put on was girded unto him, and upon it a girdle with a sword fastened upon his loins in the sheath thereof; and as he went forth it fell out.