Is it permissible to conduct business through buying and selling with a man whose wealth is mixed with lawful and unlawful?

The questioner : Is it permissible to conduct business through buying and selling with a man whose wealth is mixed with lawful and unlawful? And does this fall under the saying of the Prophet (peace and blessings be upon him): ?

The Shaykh : Yes, it is permissible for a person to conduct business through buying and selling with someone whose wealth contains both lawful and unlawful. The Prophet (peace and blessings be upon him) conducted business with the Jews, who are known for consuming usury or interest and illicit gains. He bought from them, and in fact, the Prophet (peace and blessings be upon him) died with his armor pledged to a Jew. And considering that you are a student of knowledge, it is good that you review Ibn Rajab’s (may Allah have mercy on him) commentary on *The Forty Nawawi Hadiths*, specifically on the hadith of al-Nu'man ibn Bashir: . He mentions what will please your soul, if Allah wills, to the extent that Ibn Mas'ud (may Allah be pleased with him) said: , except for something you know specifically to be forbidden, such as a thief selling you what he stole and you knowing that this is the stolen item; in that case, you do not buy it. The important thing is to review Ibn Rajab’s commentary, as it is very beneficial. Yes.