Masjid built from money of unknown source

Fatwa no. 14154 We have an old Masjid (mosque) in our village (it was built six years ago) where we offer the five daily Prayers. There are no toilets or water in that Masjid which makes some people go back without offering Salah (Prayer) in the Masjid because of the lack of water. Some benevolent people managed to build another Masjid with toilets and plenty of water, but that is not the problem. The problem is that some people say that the money used for building the Masjid is unlawful money, while other people say it is lawful and its donor is from another village. People differed on the permissibility of offering Salah in it. Is this Makruh (disliked)? We appreciate your advice, may Allah reward you with the best.

A: There is no harm in building a new Masjid in the village from the money donated (Part No. 5; Page No. 203) by a person to fulfill the people's need for a Masjid and it is permissible for them to offer Salah in it.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.