Ameerul Momineen (a.s.) informed: ‘O Kumayl, surely Allah trained the Prophet (s.a.w.a.) and the Prophet (s.a.w.a.) trained me and I train the believers…’
Bashaarah al-Mustafa Le Shiah al-Murtaza v 2 p 25 Mustadrak al-Wasaail v 17 p 267 Behaar al-Anwaar v 77 p 267, 412