indeed, you would then be like them.” [al-Nisa' 4:140] That is, if you sit with them, you are like them in sin and punishment.
Thus, there are six conditions. Some scholars mention a seventh condition: that his wealth should not be unlawful. If it is unlawful, accepting the invitation is not obligatory—for example, if he deals in usury, fraud, or lying. In truth, however, there is no textual evidence for this condition; rather, it is a matter of scholarly judgment. The Prophet, peace and blessings be upon him, accepted the invitation of a Jew (1) and ate from the sheep offered to him as a gift by the Jewish woman (2), even though the Jews are devourers of unlawful gains and usury. Moreover, the prohibition concerning the wealth of one whose wealth is unlawful here relates to the manner in which he acquired it, not to the wealth itself; the sin of earning it rests upon him. But if accepting the invitation of one who deals in usury, fraud, and the like will encourage him and encourage others, then his invitation should not be accepted.
Some scholars stipulate that accepting the invitation should not entail humiliation—for instance, if you know that the invitees are foolish and lowly people, while you are a respected man among people, such that accepting would diminish your standing and harm you. Yet this condition, too, is unsound, because it opens the door to class distinctions, condescension, and self-aggrandizement. Rather, we say: Attend and advise them; perhaps Allah will bring benefit through you.
Shaykh al-Islam, may Allah have mercy on him, said: “For this reason, we come to the mosque…”