Al-Kāfi - Volume 5 > Chapter 22(a) - Rejecting Evil in one’s Heart
Hadith #3

3- عَنْهُ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ مُفَضَّلِ بْنِ يَزِيدَ عَنْ أَبِي عَبْدِ اللهِ (عَلَيْهِ السَّلام) قَالَ قَالَ لِي يَا مُفَضَّلُ مَنْ تَعَرَّضَ لِسُلْطَانٍ جَائِرٍ فَأَصَابَتْهُ بَلِيَّةٌ لَمْ يُؤْجَرْ عَلَيْهَا وَلَمْ يُرْزَقِ الصَّبْرَ عَلَيْهَا.

3. It is narrated from (Ali ibn Ibrahim) his father from ibn abu ‘Umayr from Mufaddal ibn Yazid who has said the following: “Abu ‘Abd Allah, ‘Alayhi al-Salam, once said to me, ‘O Mufaddal, if one protests against an unjust ruler and he faces an affliction he will not receive any reward for such suffering nor is he granted any patience to bear in such suffering.’”