Ammar b. Yasir (r.a.) said – Allah’s Messenger (s.a.w.a.) informed: I advise those who believe in me to accept the Wilayat of Ali b. Abi Talib (a.s.) that those who accept his Wilayat accept my Wilayat, and those who accept my Wilayat accept the Wilayat of Allah. Those who love Ali love me, and those who love me love Allah. Those who hate Ali hate me, and those who hate me hate Allah.
Bashaarah al-Mustafa Le Shiah al-Murtaza v 2 p 151