Is it permissible to eat and drink from the food and drink of those who cultivate and sell narcotics, and is it permissible for the wife to visit her family who work in that field?

The prohibition of intoxicants is a religious necessity, and every intoxicating substance falls under its ruling. The prohibition of intoxicants has been mentioned in both the Quran and the Sunnah. Whoever relies on earning from drugs acquires unlawful wealth. It is forbidden to accept from or eat from someone whose entire wealth is unlawful, or if it is known that their food was purchased with unlawful money. Scholars have differed regarding eating from someone whose wealth is mostly unlawful, with some prohibiting it and others deeming it severely disliked, while some prohibited it absolutely. It is best to avoid eating with someone who possesses unlawful wealth. We advise you to leave this community, and if that is not possible, then you and your wife should avoid eating with them. There is no objection to visiting family with the intention of advising them and explaining the religious ruling.