Shaykh Ibn Uthaymeen was asked:

Question:

“This letter we received from Ali Sayyid Misri who works in Taif. He says in the letter, ‘What is the ruling on being hospitable to a man whose wealth is mixed with haram and halal in terms of him working at a store that sells cigarettes, for example, and at the same time other things that are halal like books, cards, and pens and other than that. What is the ruling on that work? And in terms of this man giving gifts of some things, is it allowed to take it or reject it? Please give us the verdict for that. May Allah reward you.'”

Answer:

“The ruling of the work of this man in this store is that it is allowed. However, with the condition that he stays away from dealing with the prohibited [things] like usury, selling cigarettes, and other than that of what Allah prohibited so that his earnings can be halal and good. In regards to what he gives you or him staying as a guest, then there is no harm in it. There is no blame on you for that. It is established from the Messenger (ﷺ) that he accepted the gift of the Jewish woman when she gave him the sheep in the battle of Khaybar. He (ﷺ) also answered the invitation of the Jew who invited him in Madinah for barley bread and some dates. He (ﷺ) used to interact with the Jews [through] buying and selling such that he died and his armor was mortgaged to a Jew for barely bread which he bought for his family. This indicates the permissibiilty of interacting with one whose wealth is mixed with haram. This is because the Jews are as Allah describes them in the Quran:

سماعون للكذب أكالون للسحت

(They like to) listen to falsehood, to devour anything forbidden [5:42]”

End translation. [https://binothaimeen.net/content/8495]

Translated by

Faisal Ibn Abdul Qaadir Ibn Hassan
Abu Sulaymaan