The amount of knowledge that is obligatory to know from the guidance of the Prophet (peace and blessings be upon him)

Question:
May Allah reward you, Honorable Shaykh. This questioner says: What is the amount of knowledge that it is obligatory for a servant to know from the guidance of the Prophet (peace and blessings be upon him)?

Answer:
The obligatory amount is what the scholars mentioned in the authentic biography of the Prophet (peace and blessings be upon him), such as this book, *Zad al-Ma'ad*. It is a good, well-organized book, and it is among the best biographies of the Messenger (peace and blessings be upon him).