The Wasiyatul Mustafa Book is a concise book containing the testament of the Prophet Muhammad SAW to Sayyidina Ali bin Abi Talib. This book is quite popular with Indonesian Muslims because it contains concise hadiths in language that is easy to understand. This can be seen by making the book Wasiyatul Mustafa a subject in Islamic boarding schools and the spread of virtual recitations of Wasiyatul Mustafa on social media.