a man asked the Prophet, when he had put his leg in the stirrup: "Which kind of Jihad is best?'" He said: " a word of truth spoken before an unjust rulers." (Using translation from Nasāʾī 4209)  

أَنَّ رَجُلًا سَأَلَ النَّبِيَّ ﷺ وَقَدْ وَضَعَ رِجْلَهُ فِي الْغَرْزِ أَيُّ الْجِهَادِ أَفْضَلُ؟ قَالَ «كَلِمَةُ حَقٍّ عِنْدَ سُلْطَانٍ جَائِرٍ»