What is the share of each heir from the estate of the deceased, and does the husband of the deceased daughter inherit from her grandfather?

If a man passes away, leaving behind a wife, eight sons, and five daughters, and no other heirs, then the wife receives one-eighth due to the existence of inheriting offspring, as Allah Almighty says: "But if you have a child, then for them is one eighth of what you leave." The remainder goes to the sons and daughters by ta'seeb (residuary heirship), with the male receiving the share of two females, as Allah Almighty says: "Allah instructs you concerning your children: for the male, what is equal to the share of two females." The estate is divided into 24 shares: the wife receives 3 shares, each son receives 2 shares, and each daughter receives 1 share.

As for the son who passed away afterward, his share is distributed among his heirs. The information provided about them is insufficient to determine the method of distribution (the type of kinship of his siblings). Similarly, the share of the deceased daughter (the mother) passes to her heirs, and her husband is among her heirs. He does not inherit from her father (the questioner's grandfather), but rather inherits his wife's share from her father's estate.

It is advisable to present this matter to the Sharia (definition) courts or to consult scholars directly to verify all heirs, bequests, and debts before distributing the estate.