In Sermon (123), Imam Ali (a.s.) addresses the beliefs of the Khawarij and discusses the issue of arbitration, emphasizing the Quran as the ultimate judge. This sermon was delivered during a time of intense political and ideological conflict between Imam Ali and the Khawarij, a group that had revolted against his caliphate and questioned his decisions. Imam Ali made it clear that he did not turn away from the Book of Allah.

He stated that the Quran is a written book that requires an interpreter, which are the people who understand and explain its meanings. He emphasized that when disputes arise, the proper course is to refer to Allah and His Messenger, as clearly stated in the Quran. Imam Ali asserted that if judgment is made according to the Quran, they are more deserving of leadership, and if according to the Sunnah, they are still more entitled.

In response to the Khawarij's question about why he allowed a period for arbitration, Imam explained that it was to give those who are unaware a chance to investigate, while those who know could remain steadfast in their beliefs. This period was intended to prevent hasty actions before the truth was clarified.

The Imam highlighted that the best of people in the eyes of Allah are those who adhere to the truth, even if it brings them harm, and do not turn to falsehood for the sake of benefit. He expressed sorrow over the state of the Khawarij, pointing out their weaknesses and inability to ignite the flames of war effectively. He lamented the troubles he had faced due to their actions.

This sermon teaches us the importance of adhering to the truth, even in the face of adversity. It encourages us to seek guidance from the Quran and the Sunnah in our decisions and to avoid hasty judgments without understanding the facts.