What is the ruling on borrowing with interest for the purpose of marriage, and what should the fiancée do if she becomes aware of this?

Borrowing money with interest for the purpose of marriage is not permissible. The fiancée should help him avoid this sin by waiving high dowries and being content with a small dowry that he can afford to pay. She should recall the words of Allah Almighty: "And cooperate in righteousness and piety, but do not cooperate in sin and aggression." It is permissible for her to take the dowry from that money if some or all of it is repaid from another source, otherwise, it is not lawful to take it.