[3][4][5] On his return trip to Medina after performing the Hajj, Muhammad called the Muslim caravan to a halt at the Ghadir Khumm (Arabic: غَدِير خُم, lit.
[9][10][4] In particular, the former source adds that Muhammad repeated this statement three or four times and that his companion Umar congratulated Ali after the sermon, "You have now become mawla of every faithful man and woman.
A Sunni tradition alleges that Muhammad hid parts of the revelations in Mecca but was ordered by this verse to reveal them when the Muslim community strengthened.
The Islamic philosopher Hossein Nasr and his coauthors view as most plausible such a link between the verse of tabligh and the events that followed the Farewell Pilgrimage, including the Ghadir Khumm.
[20] Shia traditions relate the verse of tabligh to the Ghadir Khumm, stressing that Muhammad was concerned about implementing his divine instruction, fearing the reaction of some of his companions.
It was only after the revelation of the verse of tabligh, which urged him to fulfill his task and ensured his safety, that Muhammad gave his sermon at the Ghadir Khumm.
[23] The Shia exegete Muhammad H. Tabatabai (d. 1981) similarly notes that the verse of tabligh evidently refers to an announcement without which the prophetic mission would have failed.
For Tabatabai, this all supports the Shia traditions that link the verse of tabligh to the Ghadir Khumm and the divine investiture of Ali with spiritual authority (walaya) over Muslims therein.