Al-Adab Al-Mufrad, Book 21, Hadith 12 (In-Book) ⓘ
A woman called Fusayla said that she heard her father say, "I asked, 'Messenger of Allah, is it part of disobedience for a man to help his people in something which is unjust?' 'Yes,' he replied."
حَدَّثَنَا زَكَرِيَّا، قَالَ: حَدَّثَنَا الْحَكَمُ بْنُ الْمُبَارَكِ، قَالَ: حَدَّثَنَا زِيَادُ بْنُ الرَّبِيعِ قَالَ: حَدَّثَنِي عَبَّادٌ الرَّمْلِيُّ قَالَ: حَدَّثَتْنِي امْرَأَةٌ يُقَالُ لَهَا: فُسَيْلَةُ، قَالَتْ: سَمِعْتُ أَبِي يَقُولُ: قُلْتُ: يَا رَسُولَ اللهِ، أَمِنَ الْعَصَبِيَّةِ أَنْ يُعِينَ الرَّجُلُ قَوْمَهُ عَلَى ظُلْمٍ؟ قَالَ: نَعَمْ.
also referenced under: Hadith 396 (Reference) & Book 21, Hadith 396 (English)