What is the share of the mother, the wife, and the full sister from the estate of a man who passed away, leaving them as heirs?

If the heirs are limited to those mentioned, the wife receives one-fourth as her prescribed share, due to the absence of a lineal descendant. The mother receives one-third as her prescribed share, due to the absence of a lineal descendant and no plurality of siblings. The sister receives one-half due to the absence of lineal descendants, ascending heirs, and a male counterpart to make her an 'asaba.

The foundational number for the shares is twelve, and it increases to thirteen. The sister receives six shares, the wife three shares, and the mother four shares.

It is important to note the seriousness and complexity of inheritance matters, for which a mere fatwa is insufficient. Rather, such cases must be referred to Sharia courts for investigation and to ensure there are no other heirs, wills, debts, or other rights taking precedence over the heirs' entitlement.