Al-Kāfi

Hadith 1211
oppression
16ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ مُحَمَّدِ بْنِ سِنَانٍ عَنْ طَلْحَةَ بْنِ زَيْدٍ عَنْ أَبِي عَبْدِ الله (عَلَيهِ السَّلام) قَالَ الْعَامِلُ بِالظُّلْمِ وَالْمُعِينُ لَهُ وَالرَّاضِي بِهِ شُرَكَاءُ ثَلاثَتُهُمْ.
16. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from Muhammad ibn Sinan from Talhah ibn Zayd from Abu ‘Abdillah (a.s.) who has said the following: “Abu ‘Abd Allah (a.s.) has said, ‘One acting unjustly, his supporter, and one who agrees with such act are three partners.’”
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī