The document discusses the Quranic verses and sayings of the Prophet Muhammad that prohibit riba (usury or interest). It presents several Quranic verses revealed between the 6th and 9th years of prophethood and hijrah that forbid consuming or charging interest. It also shares hadiths where the Prophet curses those who take or give interest and says interest has many evils. The Prophet warns that interest leads to scarcity and likens deliberately taking even a small amount of interest to committing serious sins like zina repeatedly. The document emphasizes that Islam strictly prohibits interest in all forms based on divine revelation and the teachings of the Prophet.