For the LORD your God blesses you, as he promised you: and you shall lend unto many nations, but you shall not borrow; and you shall reign over many nations, but they shall not reign over you.
All Commentaries on Deuteronomy 15:6 Go To Deuteronomy 15
Ambrose of Milan
The Hebrew lent to the nations at interest. He did not himself receive doctrine from the people but handed it down. To him the Lord opened his treasury so that the rain of his word might make the nations to grow wet and so that he might become the prince among the nations, but he himself would have no prince over himself.