I do have questions about hadiths on imam Mahdi (as)

It has been stated in Ilzam an-Nasib, thus: “When his seventieth year comes to an end and his death is about to take place, a woman named Sa‘idah from the tribe of Bani Tamim will martyr him. The salient feature of that woman is that she would have a beard like a man.

“When the Imam is passing by, she will throw a stone from a rooftop upon him and he will attain martyrdom. After he passes away, Imam al-Husayn (‘a) will perform the rites of his ghusl, kafn and burial.”

This is not authentic