What is the ruling on the property of a disbeliever (kafir) if he embraces Islam, and is it permissible for him to dispose of it without constraint? And what is the ruling on the property of a Muslim acquired through unlawful means if he repents with sincere repentance, and is it permissible for him to dispose of it after repentance?

Money acquired before Islam, if obtained through a permissible means, remains permissible both before and after embracing Islam. However, if it was acquired through an illicit means such as usury, gambling, or selling intoxicants, then what was seized from it before Islam is forgiven for him, based on the Almighty's saying: "So whoever receives an admonition from his Lord and desists, he may have what has already passed." But what was not seized and then he embraced Islam, it is not permissible for him. As for what was taken from usury, its excess must be returned to its owners or their heirs. If it is impossible to identify them, then it must be spent on charitable causes.