Eating from the money of an apostate brother who earns from gambling

Question:
May Allah reward you. This questioner says: My full brother has apostatized from Islam and earns his money from gambling. Is it permissible for me to eat the food he brings to the house, or to accept the gifts or money he gives me from time to time? May Allah reward you.

Answer:
If all his money is from what is forbidden, then it is not permissible to eat his food or accept his gifts, because it is forbidden money. However, if he has money from what is forbidden and money from what is not forbidden, and they are mixed, and you do not know that this is from the forbidden, then there is no harm, because the default is permissibility. Yes, the Prophet (peace and blessings be upon him) ate from the food of the Jews, even though they dealt in riba (usury or interest), because not all of their money was from riba; they had lawful money.