The Ghadeer Sermon, delivered by Prophet Muhammad (S) at Ghadir Khumm, marks a significant moment in Islamic history where the Prophet publicly declared Imam Ali (A.S) as his successor. This sermon emphasizes the principles of leadership, allegiance, and the continuity of divine guidance, addressing key themes of authority and faith. Its detailed content offers profound insight into the foundations of Wilayat, making it an essential text for understanding Islamic leadership and succession as it was historically established.