Amir al-mu'minin also said concerning the Kharijites:
وقال (عليه السلام) فيهم
Do not fight the Kharijites after me, because one who seeks right but does not find it, is not like one who seeks wrong and finds it.
As-Sayyid ar-Radi says: (By "one who seeks wrong and finds it") Amir al-mu'minin means Mu'awiyah and his men.
لاَ تَقْتُلُوا الْخَوَارِجَ بَعْدِي، فَلَيْسَ مَنْ طَلَبَ الْحَقَّ فَأَخْطَأَهُ، كَمَنْ طَلَبَ الْبَاطِلَ فَأَدْرَكَهُ.
قال السيد الشريف: يعني معاوية وأصحابه.
(1) Al-Saduq, 'Ilal, 201;
(2) al-Tusi, al-Tahdhib, II, 48.