Should a person pay heed to doubts that occur in nāfilah prayers (other than the doubt concerning the number of performed rak‘ahs)? For example, he is unaware whether he has done one prostration or two.
A person bought some property and paid an amount of money as a down payment. After three hours, the seller revoked the sale agreement and thus did not hand the property over to the buyer. What is the ruling?
Is the maintenance that is paid to a person by his father, brother, or a relative, considered a gift or not? If the donor has never paid khums on his assets, is it obligatory for the receiver to pay khums for the maintenance he receives from the donor?