'Loins' in the Bible

And God said unto him, I am God Almighty: be fruitful and multiply; a nation and a company of nations shall be of thee, and kings shall come out of thy loins;

And Jacob rent his garments, and put sackcloth upon his loins, and mourned for his son many days.

All the souls that came with Jacob into Egypt, that came out of his loins, besides Jacob's sons wives, all the souls were threescore and six;