More info:
https://en.wikipedia.org/wiki/Islami...ng_and_finance
https://en.wikipedia.org/wiki/Usury
"When money is lent on a contract to receive not only the principal sum again, but also an increase by way of compensation for the use, the increase is called interest by those who think it lawful, and usury by those who do not." (William Blackstone's Commentaries on the Laws of England).
https://en.wikipedia.org/wiki/Riba