Is it permissible to eat the food of a Muslim whose entire wealth was acquired through usury?

A person is commanded to seek out good and lawful food, and to avoid forbidden and doubtful things. Therefore, if a person's entire wealth is unlawful, it is forbidden to eat from it. The same applies if it is known that the food was purchased with explicitly unlawful money.

However, if most of a person's wealth is unlawful, jurists have differed regarding eating from it and dealing with it:

- The Shafi'is hold that it is disliked (makruh), and this view is also narrated within the Maliki school. - The Hanafis hold that if the predominant portion is unlawful, then it is forbidden. If the predominant portion is lawful, then it is a matter of hesitation. - The Hanbalis have four views: - Prohibition if it is known that it contains both unlawful and lawful elements, which is the analogy of the madhhab. - Absolute prohibition if the unlawful portion exceeds one-third. - Prohibition if the greater part is unlawful. - Not forbidden at all, but disliked, and the degree of dislike varies according to the abundance or scarcity of the unlawful portion. This is the soundest view in the Hanbali madhhab.

In conclusion, eating from wealth that is entirely unlawful is forbidden. If the majority of the wealth is unlawful, it is disliked, unless the food was purchased with money that was explicitly unlawful, in which case it is forbidden.