The ruling on a book regarding the exaltation of the Prophet's relics and seeking blessing from them

Question:
Honorable Shaykh, this questioner says: Recently, a book has appeared regarding the exaltation of the Prophet's relics and the permissibility of seeking blessing from them. What is your opinion on such a book?

Answer:
The book is invalid. It is not permissible to exalt the Prophet's relics. After the Messenger (peace and blessings be upon him), nothing remained of his physical relics, such as sweat, hair, or saliva, or the clothes that touched his body, from which people used to seek blessing. But after a long time, nothing of this remained. As for the relics, such as the house they call the birthplace, and so on, this is not permissible. It is not permissible to seek blessing from it, nor to exalt it, because it is a means to shirk (associating partners with Allah).
Yes, one should be warned against the book, and that what is in it is invalid speech, and it is not permissible to act upon it or be deceived by it. As for its author, his matter is left to Allah.