Jabir bin Abdullah (may Allah be pleased with them both) narrates about the Hajj of the Prophet (peace and blessings be upon him) and his sermon at Arafah that the Prophet (peace and blessings be upon him) said: "Your blood and your wealth are sacred to you, just like the sanctity of this day of yours in this city of yours and in this month of yours. Beware! All the affairs of your era of Ignorance (Jahiliyyah) have been placed beneath these feet of mine. The blood-claims of the Jahiliyyah have also been abandoned, and the first blood I forgo is the blood of Rabi'ah bin al-Harith, whom Hudhayl killed while he was being nursed among Banu Sa'd. The usury (riba) of the Jahiliyyah has also been abandoned, and the first usury I forgo is the usury of Abbas bin Abd al-Muttalib (may Allah be pleased with him). It is abandoned entirely."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب البيوع / 10464