Zadhan says that I heard Sayyiduna Ali (may Allah be pleased with him) in the courtyard of the mosque, asking people by Allah to tell who was present with the Prophet (peace be upon him) at the occasion of Ghadir Khumm and who heard the statement of the Prophet (peace be upon him)? At this, thirteen men stood up and all of them testified that they heard the Prophet (peace be upon him) saying: "Whoever I am the master of, Ali is also his master."