The ruling on the hadiths in a book whose transmission contains weakness?

The questioner : Well, Shaykh, what is meant by fame here?

The Shaykh : That the book is famous among the scholars, and they circulate it and cite it as evidence, which suffices for the chain of narration in many cases. So if there is an obscure book with no fame, and it comes with a chain as you mentioned that is weak, then in that case, all the hadiths that this book uniquely transmits remain weak and cannot be cited as evidence.

The questioner : Well, Shaykh, and does it affect the manuscript itself in which it is found?

The Shaykh : How?

The questioner : I mean, this manuscript is unique; we did not find any other manuscript containing these fabrications, and this manuscript has this defect, that an unknown man is in ... .

The Shaykh : Did you not get the answer to your question?

The questioner : It does not differ, I mean, Shaykh?

The Shaykh : Did you not get the answer to your question? I am telling you that this book is either famous, in which case the fame suffices for the chain of narration, or it is obscure with no fame, in which case every hadith in this book that it uniquely transmits becomes weak.