Al-Kāfi

Hadith 1285
oppression
5ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ عَلِيِّ بْنِ النُّعْمَانِ عَنِ ابْنِ مُسْكَانَ عَنْ مُعَلَّى بْنِ خُنَيْسٍ قَالَ سَمِعْتُ أَبَا عَبْدِ الله (عَلَيهِ السَّلام) يَقُولُ إِنَّ الله تَبَارَكَ وَتَعَالَى يَقُولُ مَنْ أَهَانَ لِي وَلِيّاً فَقَدْ أَرْصَدَ لِ��ُحَارَبَتِي وَأَنَا أَسْرَعُ شَيْ‏ءٍ إِلَى نُصْرَةِ أَوْلِيَائِي.
5. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from Ali ibn al-Nu’man from ibn Muskan from Mu’alla ibn Khunayth who has said the following: “I heard Abu ‘Abdillah (a.s.) saying, ‘Allah, the Most Blessed, the Most High, says, ‘Whoever insults any of My friends has waged a war against Me. I am the quickest to support My friends.’”
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī