Sheikh Dr. Saad bin Turki bin Mohammed Al Khathlan Former member of the senior scholars of the Kingdom Assistant Professor at the Faculty of Sharia, Imam Mohammed bin Saud University in Riyadh. He presented a series of radio episodes in which the Shaykh addressed the topics of jurisprudence in an easy and clear manner, in which he mentioned a sentence that a Muslim should know and learn about matters of his religion such as purity, prayer, zakat and other acts of worship.