'Loins' in the Bible

However, you will not build the house, but your son who has come from your loins, he shall build the house for my name.'

Then the youngsters who had grown up with him spoke to him, saying, "Thus you shall say to this people who spoke to you: 'Your father made our yoke heavy, but you lighten [it] for us,' you shall say to them, 'My little finger is thicker than my father's loins.

but the hand of Yahweh was on Elijah; he girded up his loins and ran before Ahab as one comes to Jezreel.