What is the share of each heir from the deceased's estate, and what is the ruling on bequeathing the construction of a mosque on a plot of land owned by the deceased for one of his sons in a foreign country?

Your father's will cannot be proven by your statement alone, for a will can only be proven by the testimony of two men, or one man and two women, or by one witness and an oath, or by the heirs' ratification of it. If the rest of the heirs do not ratify it, then the will is not enforceable. If they do ratify it, then it is enforceable up to one-third, and anything beyond that is not binding unless the heirs consent to it. If the will is not binding on the rest of the heirs, then it is only binding on your share of the inheritance. If this amount is not sufficient to build the mosque, then direct it towards participating in the building of another mosque.

As for the distribution of the inheritance: The two wives receive one-eighth due to the existence of a inheriting offspring, and the remainder goes to the sons and daughters, with the male receiving the share of two females. There is nothing for the sister from the father's side, as she is excluded by the son. The inheritance is to be divided into 128 shares.