What is the ruling on the condition set by the girl's family for money or other things for themselves at the time of her engagement, and what should be done if it becomes clear that this money is unlawful?

Scholars differ concerning the ruling on a father or guardian stipulating money from the Mahr or an increase upon it. The Malikis are of the opinion that all that is stipulated belongs to the wife. The Shafi'is hold that the dowry is invalid and the Mahr Al-Mithl (a customary dowry) becomes obligatory. The Hanbalis, however, deem it valid, citing as evidence the story of Shu'ayb and Musa (peace be upon them), and the Hadiths: "You and your wealth belong to your father," and "Indeed, the best of what you eat is from your earnings, and indeed, your children are from your earnings." The preponderant opinion is that of the Hanbalis. However, a guardian should not exploit marriage to demand money, as many young people have turned away from marriage due to the high costs.