In this series, Dr. Saleh As-Saleh explains Book of Purification from Umdat Al-Ahkam. Umdat Al-Ahkam is written by Imam Abdul-Ghani Al-Maqdesi. Umdat Al-Ahkam contains some of the most authentic Hadiths of the Prophet Muhammad (peace be upon him). They are chosen from Sahih Al-Bukhari and Sahih Muslim. They are listed according to their topics of the Islamic Law so that the scholars can extract and deduce Islamic rulings from them easily.