The Messenger of Allaah, may the peace and blessings of Allaah be upon him, further explains that over time differing and controversy will occur between the Muslims. He mentions to them the cure to this differing and separation, that is: Stick to my Sunnah and the Sunnah of the Rightly Guided Caliphs after me. He continued: Hold on to that with your molar teeth. The Messenger, may the peace and blessings of Allaah be upon him, warned the Muslims from innovating in matters of worship in this hadeeth: Be warned of the newly invented matters for verily every newly invented matter is an innovation and every innovation is misguidance, and to obey the Muslim rulers: I advise you with the fear of Allaah and to hear and obey (your leaders) even if an Abyssinian slave were to rule over you. The hadeeth is beautifully explained by the Scholar and former teacher at the Islamic University of Madinah, Shaikh Ubayd Al-Jaabiree and it has compiled and presented to you in this book.