Obligation of fulfilling the will as it is

Q: My father, Ibrahim Ibn Sa` Al-Zir, died a few years ago, leaving behind four sons, three daughters and a wife. He has a house in the town of Zumayqah in Dalam, and the house is near the Al-Masjid Al-Jami` (the large mosque where Jumu`ah [Friday] Prayers are held) in Zumayqah. We, inheritors, gave up the house for the expansion of the Masjid and distributed the adjacent farm among the heirs. My father (may Allah be merciful to him) bequeathed one-third of his money to be used for building a Masjid and assigned one of the heirs, Salih bin Ibrahim Al-Zir, the third of that money. On my part as the legal representative of the family in any dispute arising and in charge of the ownership deed of the farm, I asked my brother to put the will into force by building a Masjid and giving me a legal document in the name of my father, Ibrahim bin Salih Al-Zir, indicating the value of the one-third, 300,000 riyals. However, my brother Salih said he would restore many Masjids and build new small ones. All we want is to fulfill the heirs' duty in this matter and execute the bequest, so that they are not considered sinful because of the delay on the part of my brother Salih.Is our conduct correct, or as Salih said, it is enough to repair some Masjids. Kindly give us your Fatwa in this regard.

A: The person who is in charge of executing a bequest should fear Allah (Glorified and Exalted be He) and put it into force as defined by the testator, for he is (Part No. 16; Page No. 351) entrusted with this bequest. Therefore, if your father bequeathed one-third of his money for building a Masjid, then this should be as defined by the testator, and the money should not in any way whatsoever be allotted to restoring some Masjids or building small ones, because this is contradictory to the will of the testator. Furthermore, the person in charge of executing the bequest should observe the interest (of people) in building the Masjid, i.e. To build it in a suitable place to achieve the purpose of its establishment. It should be in an area where its residents are in a dire need of it, and that should fulfill the heirs' duty in the right way. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.