Is Zakat obligatory on the estate of the deceased if he did not pay it during his lifetime, and how is the estate to be divided among the mother, the wife, the son, the daughter, the full sister, and the three sons of the full brother?

First, the obligatory Zakat (definition) of the deceased must be paid, as it is a debt that takes precedence over the rights of the heirs. Then, the estate is distributed. The mother receives one-sixth due to the presence of a lineal descendant, and the wife receives one-eighth due to the presence of a lineal descendant. The remaining portion goes to the son and daughter by way of ta'sib, with the male receiving the share of two females. The full sister and the sons of the full brother receive nothing as they are excluded by the presence of the son. The estate is divided into seventy-two shares: the mother receives twelve shares, the wife receives nine shares, the son receives thirty-four shares, and the daughter receives seventeen shares. Inheritance cases must be brought before the Sharia (definition) courts for investigation.