What is the ruling of Islamic law regarding a woman who claims that an angel descends upon her, bringing down three books, and takes people's money by claiming that the angel demands it, threatening them with taking the soul of one of their family members, and claims to cure diseases? And what is the ruling on whoever believes her?

A woman's claim that an angel descended upon her and that she received three Qur'anic books is an act of disbelief in Allah and His Messenger. She is a lying charlatan who follows Musaylimah the Liar and other leaders of misguidance. She uses deception to unlawfully seize people's money. It is not permissible for a Muslim to believe her, for Muhammad (peace be upon him) is the Seal of the Prophets, and there is no prophet after him. Anyone who claims prophethood after him is a lying charlatan.