What is the ruling on eating from a father’s money that is mixed with riba (usury or interest)?

Question:
The questioner says: My father’s money has become mixed with riba (usury or interest). Is it permissible for me to eat and drink in his house? And if it is not permissible, is there a sin on me for his anger at me for that? May Allah reward you with good.

Answer:
It is permissible to eat from the food of a person who has lawful money and unlawful money mixed together. There is no harm in eating from his food, because he does not know that it is from the unlawful. He does not know that this food is from the unlawful. As long as he does not know, he eats from it. The default is permissibility. The Prophet (peace and blessings be upon him) ate from the food of the Jews, and they dealt in riba (usury or interest) and dealt in what is unlawful, because not all of their money is not all of their money is from the unlawful. They have some money from the lawful. The Messenger ate from it (peace and blessings be upon him) and did not ask. But if a person’s money is all from the unlawful. All from the unlawful, then it is not permissible to eat from his food. Yes.