(17) باب الأَمْرِ وَالنَّهْىِ
Narrated AbuSa'id al-Khudri:
The Prophet (ﷺ) said: The best fighting (jihad) in the path of Allah is (to speak) a word of justice to an oppressive ruler. (AR)
Reference (AR): Sunan Abi Dawud 4344 (AR)
In-book reference (AR): Book 39, Hadith 54 (AR)
English translation (AR): Book 38, Hadith 4330 (AR)