What is the ruling of the Shari'ah regarding accepting donations from singers for building mosques and praying in them?

Question:
May Allah reward you, Honorable Shaykh. This questioner says: In these days, it has become widespread for some singers to build mosques, or to contribute to the establishment of mosques. The question is: What is the legal ruling on accepting these donations, and likewise, on praying in these mosques that these people built?

Answer:
By Allah, this requires consideration. The requirement is that only lawful money and good earnings enter the mosque. But this person has repented to Allah the Exalted. So, if he repents to Allah, is his money to be spent on the mosque because it is in the category of lost money that has no owner, or not? They said: No. Forbidden money, if its owner repents from it and it is accumulated with him, he gets rid of it by placing it in projects other than mosques, in projects that benefit people other than mosques, such as building restrooms on the roads or near mosques, or things people need. As for mosques, nothing of this enters them. And there is no doubt that this is the closest view, and Allah knows best. May Allah reward you. It has ended. And Allah the Exalted knows best, and may Allah send prayers and peace upon our Prophet Muhammad.