Al Ushul Ast Tsalatsah is a term used to describe the three main guidelines of Muslims. This term is taken from the name of the book written by Shaykh Muhammad bin Abdul Wahhab Rahimahullah (1115 – 1206 H).
The discussion of the Al Ushul Ast Tsalatsah book is included in the realm of Islamic faith. This book discusses the three main questions that the angels gave to the bodies in the grave, namely about who is your god, what is your religion, and who is your prophet.