Imam Ja‘far al-Ṣadiq (as): Allah will not speak to three types of people on the Day of Resurrection, nor will He purify them, and there will be a painful punishment for them: one who falsely claims the position of Imama [i.e. Leadership] endorsed by Allah, one who rejects an Imam endorsed by Allah, and one who assumes that these two have any share in Islam. al-Kāfī