وَعَن واثلةَ بن الأسقَعِ قَالَ: قُلْتُ: يَا رَسُولَ اللَّهِ مَا الْعَصَبِيَّةُ؟ قَالَ: «أَنْ تُعِينَ قَوْمَكَ عَلَى الظُّلْمِ» رَوَاهُ أَبُو دَاوُد
Wathilah bin Asqa’ (may Allah be pleased with him) reports: I asked, “O Messenger of Allah! What is ‘asabiyyah (tribalism)?” He (peace and blessings of Allah be upon him) said: “That you help your people in wrongdoing.” (Weak chain), narrated by Abu Dawood.