Ibn al -Qayyim, may God have mercy on him, said: This is a book that I called the evacuation of understanding in the virtue of prayer and peace be upon Muhammad is the best of the people, which is five chapters, and it is a book that is individual in its meaning. Its goodness and its reasoning between us is a clear statement in its ills, then the secrets of this supplication and its honor, and what it included in the ruling and the benefits, then the citizen of prayer, may God bless him and grant him peace, and its impossible, then talk about the amount of duty of it, the difference of scholars in it, the weighting of the most correct and the falsification of the fake And the laboratory of the book is above his description, praise be to God, Lord of the worlds.