He said: Mu<ammad b. A<mad b. `Alí b. Mukhallad (d. about 357 A.H) narrated to us, he said that Mu<ammad b. `Uthmán b. Abí Shaybah narrated to us, he said: Ya<ya al-\immání narrated to me, he said; Qays b. al-Rabí` narrated to me from Abí Hárún al-`Abdí from Abí Sa`íd al-Khudrí, may Allah be pleased with him:
The Prophet, blessings and salutations of Alláh on him, summoned people to `Alí in Ghadír Khumm. He gave instructions about the thorns under the tree and they were swept up. That was a Thursday. He called `Alí and took him by his upper arms and raised them up until the people saw the whiteness of the armpits of the Messenger of Alláh. They did not disperse until this verse was revealed: ‘Today I have perfected for you your religion...’ (5:3).
The Messenger of Alláh, blessings and salutations of Alláh on him, said: "Alláh is most Great at the perfection of religion and the completion of blessings, and the Lord’s acceptance of my mission and the mastership (wiláya) of `Alí, peace be upon him, after me."
Then he said: "Of whomsoever I am master, `Alí is his master. O Alláh, befriend one who befriends him and be at enmity with one who is hostile to him; help the one who helps him and forsake the one who forsakes him."
\assán said: "Permit me, O Messenger of Alláh, to recite some verses on `Alí for you to hear." He said: Recite, with the blessing of Alláh."
So \assán rose and said: "O elders of Quraysh, I follow it with my profession of the testimony of the Messenger of Alláh concerning the mastership (wiláya) that is decreed." Then he recited:
"On the day of al-Ghadír their Prophet calls to them at Khumm, so listen to the Messenger calling;
He says: Who is your master and your guardian? They said, without displaying blindness there:
Your God is our Master and you are our guardian, and you will not find among us anyone disobedient concerning the Wiláya.
He said to him: Rise, O `Alí, for I approve of you as Imám and guide after me;
Of whomsoever I am master (mawlá), then this is his guardian;
Be to him followers of truth, adhering;
Thereupon he called out: O Allah befriend his friend and to him who opposes `Alí, be at enmity."