Al-Kāfi - Volume 2 > Disbelief
Hadith #16

16ـ الْحُسَيْنُ بْنُ مُحَمَّدٍ عَنْ مُعَلَّى بْنِ مُحَمَّدٍ عَنِ الْوَشَّاءِ عَنْ عَبْدِ الله بْنِ سِنَانٍ عَنْ أَبِي حَمْزَةَ قَالَ سَمِعْتُ أَبَا جَعْفَرٍ (عَلَيهِ السَّلام) يَقُولُ إِنَّ عَلِيّاً (صَلَّى اللهُ عَلَيْهِ وآلِه) بَابٌ فَتَحَهُ الله مَنْ دَخَلَهُ كَانَ مُؤْمِناً وَمَنْ خَرَجَ مِنْهُ كَانَ كَافِراً.

16. Al-Husayn ibn Muhammad has narrated from Mu’alla’ ibn Muhammad from al- Washsha’ from ‘Abd Allah ibn Sinan from abu Hamza who has said the following: “I heard abu la’ far (a.s.) saying, ‘Amir al-Mu’minin, Ali ibn abu Talib (a.s.) is a (means of) access that Allah has prepared. Whoever approaches through this access is a believer and whoever departs is an unbeliever.’”