The ruling on eating from a father's money if it is forbidden

Question:
May Allah reward you. This questioner says: Honorable Shaykh, my father obtains money through forbidden means and spends this forbidden money on his children. He gets his food through theft and feeds the household, yet he is convinced of his own rightness and never accepts advice from anyone because he is very hot-tempered. The question is: if his children eat from the food this father brings from forbidden money, are they sinful? Knowing that they have no one to support them other than this man? Please guide us in light of this question.

Answer:
If they are certain that this money is one hundred percent forbidden and they are able to eat from lawful sources, having the capacity to be self-sufficient through lawful means, then it is not permissible for them to eat from this food because it is forbidden. However, if this man has lawful money and forbidden money, and it is not known which type this food comes from, then there is no harm in eating from his food, because the Prophet (peace and blessings be upon him) ate from the food of the Jews, and they dealt in riba (usury or interest), but they had lawful wealth. As for if these children are unable to become independent and have no food source other than what their father provides for them, then they eat to the extent of necessity, and the sin is upon him, the one who acquired it, until they are able to get rid of it and distance themselves from the forbidden. Yes.