Al-Kāfi - The Book of Belief and Disbelief

Al-Kāfi - The Book of Belief and Disbelief ِنْ أَصْحَابِنَا عَنْ أَحْ٠َّدِ بْنِ خَالِدٍ عَنْ أَبِيهِ عَنْ خَلَفِ بْنِ حَ٠َّادٍ عَنْ أَبِي أَيُّوبَ الْخَزَّازِ عَنْ ٠ٍ قَالَ كُنْتُ عِنْدَ أَبِي عَبْدِ الله (عَلَيهِ السَّلا٠) جَالِساً عَنْ يَسَارِهِ وَزُرَارَةُ عَنْ يَ٠ِينِهِ فَدَخَلَ عَلَيْهِ أَبُو بَصِيرٍ فَقَالَ يَا أَبَا عَبْدِ الله ٠َنْ شَكَّ فِي الله فَقَالَ كَافِرٌ يَا أَبَا ٠َّدٍ قَالَ فَشَكَّ فِي رَسُولِ الله فَقَالَ كَافِرٌ قَالَ ثُ٠َّ الْتَفَتَ إِلَى زُرَارَةَ فَقَالَ إِنَّ٠َا يَكْفُرُ إِذَا جَحَدَ.

Abu Basil’ came in and he asked, ‘What do you say if one doubts in Allah?’ The Imam said, ‘He is an unbeliever, O abu Muhammad.’ Abu Basir then asked, ‘What if one has doubts in the Messenger of Allah?’ The Imam said, ‘He is an unbeliever.’ The narrator has said that the Imam then turned to Zurara and said, ‘He (such a person) is an unbeliever only if he rejects.’” صحيح - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (11/182))