Ibn Shubrumah (may Allah have mercy on him) said: A trustworthy narrator informed me that Hasan bin Ali (may Allah be pleased with them both) used to say: "Only the heirs of each person will inherit from him."

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.

Kharijah bin Zaid bin Thabit (may Allah have mercy on him) says: It was said that if a group of people die together in a calamity (for example: a wall collapsing, drowning, burning) and the time of death of one is not known to be before the other, then none of them inherits from the other, nor does anyone else become deprived of inheritance because of them. Each one’s living heirs will inherit from him, as if there is no kinship among the deceased.

Saiduna Umar bin Abdul Aziz (may Allah have mercy on him) said: "If a group of people die together, for example, if they drown in a boat or a building collapses on them or they are killed, and it is not known who died first, then none of them will be made the heir of the other. Except if it becomes known that so-and-so died first, then the other will be his heir, and the heirs of the second will be his living agnates. If it is not known who died first, then the living agnates will be the heirs."

Rashid bin Sa’d (may Allah have mercy on him), Hakim bin Umair (may Allah have mercy on him), and Abdur Rahman bin Abi Awf (may Allah have mercy on him) said:“The deceased does not inherit from the deceased; only the living becomes the heir of the deceased, and their living agnates become the heirs.”