What is the ruling on a father furnishing his daughter with belongings if the father works in a usurious bank, and what is the ruling on intermingling with this father in terms of food, drink, and gifts?

It is not permissible to deal with someone whose entire wealth is unlawful (haram), nor to eat from his wealth. As for someone whose majority of wealth is unlawful, the preponderant opinion is that dealing with him and eating from his wealth is disliked (makrooh), unless it is known that the specific food item was purchased with unlawful money.

Accordingly, if the father's entire earning is from an usurious bank, it is not permissible to use what he has prepared for his daughter because it is unlawful wealth. However, if most of his money is from usury, with some lawful money also present, then using the dowry items (or trousseau) is disliked.

The ruling of prohibition or dislike applies when there is no necessity. If the dowry items are necessary and cannot be purchased otherwise, then it is permissible to take only what is necessitated, without excess, based on the Almighty's saying: "And He has explained in detail to you what He has forbidden you, excepting that to which you are compelled."

The ruling concerning gifts, food, and drink from someone whose entire wealth is unlawful or whose majority of wealth is unlawful, is the same as the aforementioned ruling.