(Ibid. 15:6) "And you will lend to many nations": I might think that you will borrow a sela (about two shekels) and lend a shekel, as others do; it is, therefore, written "and you shall not borrow."
"and you will rule many nations": I might think that you will rule others and others will rule you, as in (Judges 1:7) "And Adoni-bezek said, etc."; it is, therefore, written "and they will not rule you."
(Ibid. 7) "If there be in you a pauper": and not in gentiles.
"of one of your brothers": your brothers from your mother; "one (of your brothers"): your brothers from your father. We are hereby (["one"]) taught that your brothers from your father take precedence to your brothers from your mother.