hadith
5719
۞
Imam Ali (AS) said, Keep away from injustice, for it is the biggest sin; and verily the unjust will surely be chastised on the Day of Resurrection because of his injustice.
الإمامُ عليٌّ (عَلَيهِ الّسَلامُ) : إيّاكَ وَ الظُّلْمَ فَإنَّهُ أكْبَرُ المعَاصي وَ إنَّ الظّالِمَ لَمُعاقَبٌ يَوْمَ القِيمَةِ بِظُلْمِهِ