Allah’s Messenger (s.a.w.a.) informed: Ali is the most decisive in passing judgement from the Book of Allah from among my nation. Know that one who loves me then he must love him (Ali a.s.). Surely a person cannot reach my Wilayat except with the love of Ali b. Abi Talib (a.s.).
Bashaarah al-Mustafa Le Shiah al-Murtaza v 2 p 149 Behaar al-Anwaar v 39 p 283