How is the inheritance to be divided among the deceased's heirs, who are: one son and six daughters, taking into account his bequests which include allocating a house for the unmarried daughters, allocating an apartment for the son until he moves to a house he owns, not allocating an allowance for the house designated for the daughters, and specifying which properties are to be sold and which are not?

Designating one house for the daughters and the apartment for the son is considered a bequest to an heir (وصية لوارث). This bequest is not enforceable unless the other heirs consent to its execution, according to the Hanafis and the majority of Shafi'is and Hanbalis. It is absolutely invalid according to the Malikis and a less common view among the Shafi'is. If the heirs do not consent, the entire inheritance is to be distributed according to Islamic law. A bequest to sell a property without specifying how its proceeds are to be spent is invalid. No specific provision from the estate is to be allocated for unmarried daughters; rather, they should spend from their own shares. If the deceased left behind only one son and six daughters, the inheritance is to be divided among them according to the principle of "to the male, the share of two females," meaning the son receives two shares and each daughter receives one share.