The Event of Ghadīr , according to Shi’a beliefs, is among the most important events in the history of Islam, in which on his return from Hajjat al-Wida’, the Prophet (s) introduced Imam Ali (a) as his vicegerent and people’s guardian after himself at a place called Ghadir Khum, where everyone including greatest companions pledged their allegiance with Imam Ali (a).
This introduction was according to divine command in al-Tabligh Verse which was revealed a little earlier than Dhu l-Hijja 18, 10/March 19, 632 commanding the Prophet (s) to communicate to people whatever has been revealed to him and if he does not, it is as if he has not fulfilled his mission. Subsequently, al-Ikmal Verse was revealed saying: “Today I have perfected your religion for you, and I have completed My blessing upon you, and I have approved Islam as your religion.”
The Infallibles (a) have referred to al-Ghadir Sermon and many poets -from the time of Imam Ali (a) onward- have composed poems about this event. Among the most prominent works about the Event of Ghadir and al-Ghadir Sermon is al-Ghadir fi l-kitab wa l-sunna wa l-adab by al-‘Allama al-Amini. The Prophet (s) and other infallibles (a) have called this day “Eid” (Holy