Imam Jafar Sadiq (a.s.) informed: One who does not bring to Allah the Almighty on the Day of Resurrection with what you have believed in (Mastership of the Ahle Bait a.s.), then no goodness from him is accepted and his sins are not pardoned.
Al-Kaafi v 8 p 34 Behaar al-Anwaar v 68 p 49