The lineage of the syafi'i priest

We all know who syafei but did we know that the priest whose memory power is so astonishing that the entire book in the reading can be memorized (When he read a book, he tried to close the left-hand page with his right hand for fear of seeing the left-hand page and memorize it first before memorizing the right page) is the offspring of the Messenger of Allah ..? See the scheme ..