What is the ruling on going to the tombs of the righteous purely for the purpose of trade, without believing in what others do, such as slaughtering and intermingling?

These celebrations are legally reprehensible matters. Going to graves at a specific time is prohibited, based on the saying of the Prophet (peace be upon him): "Do not turn my grave into a place of celebration (Eid)."

These celebrations often include manifestations of polytheism, such as exaggeration regarding the occupants of the graves and intermingling. Ibn Taymiyyah held that intending to visit graves on a specific day is to treat them as a place of celebration, and that traveling to visit them for worship is unanimously prohibited. Slaughtering sacrifices near them is also legally forbidden.

As for going to the locations of these celebrations for trade, there are two prohibitions:

First: Witnessing forbidden celebrations, which is not permissible for a Muslim, based on the Almighty's saying: "And He has already revealed to you in the Book that when you hear the verses of Allah being denied and ridiculed, do not sit with them until they enter into another conversation. Indeed, in that case, you would be like them" (An-Nisa: 140).

Second: Assisting in these celebrations, which is not permissible, based on the Almighty's saying: "And cooperate in righteousness and piety, but do not cooperate in sin and aggression" (Al-Ma'idah: 2).

Therefore, going to the place of this celebration to participate with its people is forbidden. As for trading with those who witness this celebration, there is a difference of opinion among scholars, and the more cautious approach is to avoid it.