I heard al-Hajjaj say in his address: Is the messenger of one of you sent for some need is more respectable with him or his successor among his people? I thought in my mind: I make a vow for Allah that I shall never pray behind you. If I find people who fight against you, I shall fight against you along with them. Ishaq added in his version: He fought in the battle of al-Jamajim until he was killed.  

فِي خُطْبَتِهِ رَسُولُ أَحَدِكُمْ فِي حَاجَتِهِ أَكْرَمُ عَلَيْهِ أَمْ خَلِيفَتُهُ فِي أَهْلِهِ فَقُلْتُ فِي نَفْسِي لِلَّهِ عَلَىَّ أَلاَّ أُصَلِّيَ خَلْفَكَ صَلاَةً أَبَدًا وَإِنْ وَجَدْتُ قَوْمًا يُجَاهِدُونَكَ لأُجَاهِدَنَّكَ مَعَهُمْ زَادَ إِسْحَاقُ فِي حَدِيثِهِ قَالَ فَقَاتَلَ فِي الْجَمَاجِمِ حَتَّى قُتِلَ