What is the ruling on building mosques with charity funds?

Question : The questioner asks: Is it permissible to build mosques with ongoing charity?

Answer : Yes, building mosques with ongoing charity, other than zakah, is permissible, and it becomes ongoing charity. On this occasion, I would like to point out that it has become the custom of people in the land of Najd, and I think even in the southern and northern lands, that they establish endowments (waqf) specifically for some of their heirs after their death. This results in disputes among the descendants that burden the descendants and also burden the judges. If people had made their bequests to relatives who do not inherit, and for the construction of public mosques, it would have been better. As for making it for relatives who do not inherit, it is because Allah the Exalted said in the Qur'an: However, the bequest to parents was abrogated in the verses of inheritance, and likewise the bequest to close relatives who are heirs was abrogated in the verses of inheritance. So what remains are the relatives who are not heirs, for whom one may make a bequest.
As for the bequest for mosques, its matter is known, because whoever builds a mosque for Allah the Exalted, Allah will build for him a house in Paradise. And because the Muslims benefit from the mosques through prayers, circles of dhikr, and other things that constitute ongoing charity for the deceased.