Does a son who dies after his father inherit from his deceased father's estate while the mother is still alive, and what is the share of each heir?

The son who passed away after his father is entitled to a share in his father's inheritance, which then transfers to his heirs. If he left only those mentioned, then his mother receives one-sixth, his wife one-eighth, and his daughters two-thirds. The remaining portion goes to his brothers and sisters by way of ta'sib (agnatic inheritance), with the male receiving the share of two females, provided they are full siblings or paternal siblings. As for maternal siblings, they are excluded by the female lineal descendant. Complex issues should be referred to Sharia courts or discussed directly with scholars to verify all heirs, wills, and debts, as these take precedence over the rights of the heirs.