Befriend whoever befriends him and be the enemy of whoever...
Befriend whoever befriends him and be the enemy of whoever chooses to be his enemy.' ‘Umar 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.'" Al-Nisa'i has quoted ‘Ayisha daughter of Sa’d saying that she heard her father saying: "I have heard the Messenger of Allah, peace be upon him and his progeny, on the Day of Juhfa, when he took ‘Ali's hand and delivered a sermon, praised and adored Allah, then said: ‘O people!
I am your wali .' They said: ‘You have said the truth.' Then he raised ‘Ali's hand and said: ‘This is my wali unto you to discharge the responsibilities of my religion on my own behalf, and I support whoever supports him and am the enemy of whosoever chooses to be his enemy.'" Sa’d is also quoted saying: "We were in the company of the Messenger of Allah (pbuh).
When he arrived at Ghadir Khumm, those who went ahead of him returned to join him, while he waited for those who lagged behind, till all people assembled. Then he said: ‘O people! Who is your wali ?' They answered: ‘Allah and His Messenger.' Then he took ‘Ali's hand, made him rise and said: ‘Whoever has taken Allah and His Messenger as his wali , this (‘Ali) is his wali ; O Lord! Befriend whoever…