ثَلاثَةٌ لا يُكَلِّمُهُمُ اللّهُ يومَ القِيامَةِ و لا يُزَكِّيهِمْ وَ لَهُمْ عَذابٌ ألِيمٌ : مَنِ ادّعى إمامةً مِنَ اللّهِ لَيسَتْ لَهُ ، و مَنْ جَحَدَ إماما مِنَ اللّهِ ، و مَنْ زَعَمَ أنّ لَهُما في الإسلامِ نَصيبا .
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.
Source:
al-Kāfī
Vol1
P373
ID: 27477