I was beneath the she-camel of the Messenger of Allah ﷺ, with its saliva dripping onto me, when I heard him say, "Allah has assigned to every rightful person their due, so there is no bequest for an heir…"
إني لتحت ناقة رسول الله ﷺ يسيل علي لعابها، فسمعته يقول: إن الله جعل لكل ذي حق حقه، ألا لا وصية لوارث…
Ibn Majah (2714) narrated it from Hisham bin Ammar, who said, Muhammad bin Shuayb bin Shabur told us, who said, Abdul-Rahman bin Yazid bin Jabir told us, from Saeed bin Abu Saeed, that he related it to him from Anas bin Malik, and he mentioned it. Its isnad is sahih, and although there is some minor criticism of Muhammad bin Shuayb, it does not harm the narration, since it has been corroborated regarding the substance of the Prophet's ﷺ sermon during the Farewell Pilgrimage. As for Saeed bin Abu Saeed, he is apparently Maqburi, though it has been said that he is a different man from the coast of Beirut. I mentioned this in the discussion of the Prophet's ﷺ sermons during the Farewell Pilgrimage, so refer back to it.