Sulayman bin Amr narrates from his father (may Allah be pleased with him): I heard the Prophet (peace and blessings be upon him) during the Farewell Hajj saying: "All the usury of the Jahiliyyah has been abandoned; you shall have your principal — you shall neither wrong nor be wronged [Surah al-Baqarah: 279]. Beware! All the blood-claims of the Jahiliyyah have been forgiven, and the first blood I forgive is the blood of al-Harith bin Abd al-Muttalib, who was being nursed among Banu Layth when Hudhayl killed him. O Allah, have I conveyed?" They said three times: Yes! He (peace and blessings be upon him) said three times: "O Allah, be witness." He said it three times.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب البيوع / 10465