Ruling on transferring the funds of one mosque to another

Question:
There is a mosque in the United States of America for which funds were collected and it was built, and a large amount of money remained. There is another mosque in a different area with a large Muslim community around it, which requires the construction of a library, a school, and some annexes. Some of the people in charge of the second mosque want to take some of the money held by the people in charge of the first mosque. The owners of the first mosque object, arguing that the money belongs to the first mosque. They say: If Shaykh 'Abd al-'Aziz ibn Baz issues a ruling permitting the transfer of the money from that mosque to this one, we have no objection to it. We ask for your guidance on this matter?

Answer:
If the first mosque, for which the money was collected, has been completed and no longer needs the money, then the surplus funds are to be spent on building other mosques, along with the libraries, restrooms, and similar facilities added to them, as the scholars have stated in their books on endowments (waqf). This is because it is of the same kind as the mosque for which the donation was made. It is well known that the donors intended to contribute to the construction of a house of Allah. Therefore, whatever remains is to be spent on something similar. If no mosque in need is found, the surplus is to be spent on the general interests of the Muslims, such as mosques, hostels, and charity for the poor, and the like. And success is from Allah.