Eating the food of one who works in a riba (usury or interest) establishment

Question:
This man is asking. He says: A man works in a riba (usury or interest) establishment, and he has no income other than this income. He says: How do we deal with him and his food if he invites us to his home, and he is someone with whom we must maintain family ties?

Answer:
If you know that this food is from haram (forbidden) earnings, do not eat from it. However, if he has haram (forbidden) earnings and he also has good, halal (lawful) earnings, then eat, eat from it, as long as you do not know that it is from the haram (forbidden) earnings. The Prophet (peace and blessings be upon him) used to eat the food of the Jews, even though they dealt in riba (usury or interest). Yes, because it was not established that this money was from riba (usury or interest); they had money other than riba (usury or interest). Yes.