Musannaf Ibn Abi Shaybah 38719 — the first to do a thing, and who did

It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) praised and glorified Allah Almighty as He deserves, then said: "O people, all blood from the time of ignorance is void. The first blood is the blood of Iyas bin Rabi'ah bin al-Harith. He was being nursed among Banu Layth, and Hudhayl killed him. And the first usury (riba) of the time of ignorance is the usury of Abbas bin Abd al-Muttalib; this is the first usury that I remit. You are entitled to your wealth in full; you shall neither wrong nor be wronged."