What is the ruling of the Sharia on selling a plot of land, owned jointly by a person and his brother, to a usurious bank that wishes to build a usurious bank on it, and what should he do if his brother wishes to sell despite the Sharia prohibition?

It is impermissible to sell land to someone who intends to use it for an unlawful purpose, such as building an interest-based bank on it. This is because means take the rulings of their ends, and whatever leads to the unlawful is itself unlawful. Jurists have stipulated the prohibition of selling grapes to someone who will make wine from them, and renting a house to someone who will use it for unlawful purposes, due to the assistance this entails in what Allah the Almighty has forbidden. Ibn Qudamah said: "This ruling applies to everything intended for the unlawful... it is unlawful, and the contract is void." Accordingly, it is impermissible to sell the land to the aforementioned bank, and the brother does not have the right to dispose of his brother's share. If he sells his share to the bank, his brother has the right of pre-emption (shufa'a). The brother should be advised and admonished to fear Allah and not assist the people of falsehood.