Will the dancer "Fifi Abdou" be rewarded for providing iftar meals for fasting people and establishing "Mawa'id Al-Rahman" (charity iftar tables) and for performing Hajj, given that her income is from dancing (i.e., from haram money)? Is it permissible to do such things with haram money? Is it permissible to build a mosque with haram money?

Filthy money obtained from prohibited dancing and singing is unlawful (haram (definition)). Its earner must repent and dispose of it by returning it to its owners, if possible. Otherwise, it should be given in charity. The recipient of this charity will not be rewarded. There is no objection to praying in a mosque built with unlawful money. As for performing Hajj with unlawful money, it is valid according to the majority of scholars, fulfilling the obligation while incurring sin and no reward. However, according to Imam Ahmad, it is invalid and does not fulfill the obligation.