My father took a piece of land without any right, and we have lawful land. Should I eat with them because it is difficult to separate the unlawful money from the lawful?

Question:
He asks and says: My father took a piece of agricultural land without any right, and I advised him and my older brothers, but they did not respond. We have another piece of land that is lawful. Is it lawful or forbidden for me to eat with them? Because it is difficult to separate the unlawful money from the lawful money. And regarding inheritance, is it better to leave the unlawful inheritance to my brothers? Or should I take it and give it to the owner of the land? May Allah reward you with good.

Answer:
If you know the unlawful thing specifically, it is not permissible for you to take it. However, if the lawful is mixed with the unlawful, you may eat; because it is not established that this food is from the unlawful. As long as they have both lawful and unlawful, there is no harm in eating from their food; because the Prophet (peace and blessings be upon him) used to eat from the food of the Jews, and they engaged in forbidden transactions, such as riba (usury or interest) and others; because not everything they have is unlawful, rather their wealth is mixed. As for the matter of inheritance, what you know to be unlawful, it is not permissible for you to take from it. Yes.