What is the ruling on accepting the invitation of one who eats what is forbidden?

Question : The questioner says: If a person is known to be one who possesses forbidden wealth, is it permissible for me to accept his invitation and eat from his food?

Answer : Yes, if a person earns forbidden wealth and invites you to a feast for an occasion or otherwise, there is no harm in accepting his invitation and eating from his food and drinking from his drink. This is because the Prophet (peace and blessings be upon him) accepted the invitation of the Jews. A Jew invited him to barley bread and a stinky, rancid condiment, meaning a spoiled, foul-smelling fat used as a sauce, and he accepted and ate. Also, a woman presented him with a sheep on the day of the conquest of Khaybar, and he accepted the gift.
He also bought from a Jew in Madinah, purchasing food for his family, and he pledged his armor (peace and blessings be upon him). The Prophet (peace and blessings be upon him) died while his armor was still pledged with the Jew. So, dealing with one who has forbidden wealth is permissible if the transaction itself is lawful. However, if refraining from accepting his invitation and cutting off dealings with him would stop him from the forbidden, then what do we say? We refrain. You do not accept the invitation, nor do you buy from him, nor sell to him. But if there is no benefit