Saalam alaikum.

It was reported from Bara ibn Azeeb (r.a):

“We were in the company of the Messenger of Allah (sallalahu alaihi wa ala alihi wa sallam) when we camped at Ghadir Khumm. The call for congregational prayers was made. The site of two trees was chosen and it was swept clean. He performed the noon-time prayers then took `Ali by the hand and asked the crowd: `Do you not know that I have more authority over the believers than the believers themselves have?’ They answered: `Yes we do.’ He asked: `Do you know that I have more authority over every believer than the believer himself has?’ They answered in the affirmative; then he took `Ali’s hand and said: `Whoever has accepted me as his master this `Ali is his master; O Lord! Befriend whoever befriends him and be the enemy of whoever chooses to be his enemy.’ `Umer met him immediately following that and said to him: `Congratulations to you son of Abu Talib! You have become at dawn and at sunset the master of every believing man and woman.'”

We seen many shias who use this hadith as an evidence.

It was transmitted by ibn Askakir in “Tarih” (42/221), Ahmad in “Musnad”  and “Fadhail” (1016), Thalabi in “Kashf wal bayan” (5/131), Ajurri “Shariah” (1480)  and ibn Abu Shayba in “Musannaf” with little difference.

All of them transmitted it via Ali ibn Zayd ibn Jadan. Weak rafidi in accordance to almost majority of all scholars.