Ja'far bin Muhammad (may Allah have mercy on him) narrates from his father that Sayyida Umm Kulthum bint Ali (may Allah be pleased with her) and her son Zaid bin Umar passed away, and the news of both their deaths came together on the way, and it could not be known who died first. Thus, neither of them inherited from the other, and likewise, the people of Siffin did not inherit from each other, and the people of Harrah also did not inherit from each other.