How authentic are the hadiths: "O Ali, this is Jibreel informing me that Allah has married you to Fatimah," "Fatimah is a part of me; what pains her pains me, and what pleases her pleases me," "The Mahdi is from my progeny, from the offspring of Fatimah," and "The verse of purification was revealed concerning five: myself, Ali, Hasan, Husain, and Fatimah"?

The hadith (definition) about the Mahdi being from the progeny of the Prophet, peace and blessings be upon him, and from the children of Fatimah is authentic. As for the hadith, "Fatimah is a part of me; what grieves her grieves me, and what pleases her pleases me," it was authenticated by Al-Hakim, and Al-Dhahabi concurred with him. Regarding the matter of Allah marrying Ali to Fatimah, there are fabricated hadiths concerning it.