Al-Kāfi - Volume 1 > Allah’s Authorities and Means of Justification of Accountability in People
Hadith #3

مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ عِيسَى عَنِ ابْنِ فَضَّالٍ عَنْ دَاوُدَ بْنِ فَرْقَدٍ عَنْ أَبِي الْحَسَنِ زَكَرِيَّا بْنِ يَحْيَى عَنْ أَبِي عَبْدِ الله (عَلَيْهِ السَّلام) قَالَ مَا حَجَبَ الله عَنِ الْعِبَادِ فَهُوَ مَوْضُوعٌ عَنْهُمْ.

Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad ibn ‘Isa from ibn Faddal from Dawud ibn Farqad from abu al-Hassan Zakariyya from abu ‘Abd Allah, recipient of divine supreme covenant, who said the following: “Whatever Allah has kept hidden from people they will not be held responsible for it.”