Al-Kāfi
Hadith 972ـ عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ سَهْلِ بْنِ زِيَادٍ وَالْحُسَيْنُ بْنُ مُحَمَّدٍ عَنْ مُعَلَّى بْنِ مُحَمَّدٍ جَمِيعاً عَنِ الْوَشَّاءِ عَنْ أَبِي الْحَسَنِ (عَلَيهِ السَّلام) قَالَ سَمِعْتُهُ يَقُولُ الإيمَانُ فَوْقَ الإسْلامِ بِدَرَجَةٍ وَالتَّقْوَى فَوْقَ الإيمَانِ بِدَرَجَةٍ وَالْيَقِينُ فَوْقَ التَّقْوَى بِدَرَجَةٍ وَمَا قُسِمَ فِي النَّاسِ شَيْءٌ أَقَلُّ مِنَ الْيَقِينِ.
2. A number of our people have narrated from Sahl ibn Ziyad and al-Husayn ibn Muhammad from Mu’alla ibn Muhammad all from al-Washsha’ who has said the following: “I heard abu Al-Hassan (a.s.) saying, ‘Belief is above Islam by one degree. Piety is above belief by one degree. Certainty is above piety by one degree. Nothing is distributed so little among people as certainty is.’”