Hasan on Khawarij: Rebels fight for sake of the world, not Islam

Abu Hayyan al-Tawhidi reported: A man from the Khawarij came to Hasan al-Basri, may Allah have mercy on him, and he said, “What do you say about the rebels?” Hasan said, “They are seekers of the world.” The man said, “Why do you say that when one of them goes out with his spear until it breaks and he leaves his family and children?” Hasan said, “Tell me about the ruler. Does he prevent you from establishing prayer, giving charity, and performing the pilgrimage?” The man said no. Hasan said, “As I see it, he has only prevented you from seeking the world and you have fought him for it.”

Source: al-Baṣā’ir wal-Dhakhā’ir 1/34

عن أبي حيان التوحيدي أتى رجل من الخوارج الحسن البصري رحمه الله فقال له ما تقول في الخوارج قال هم أصحاب دنيا قال ومن أين قلت وأحدهم يمشي في الرمح حتى ينكسر فيه ويخرج من أهله وولده قال الحسن حدثني عن السلطان أيمنعك من إقامة الصلاة وإيتاء الزكاة والحج والعمرة قال لا قال فأراه إنما منعك الدنيا فقاتلته عليها

1/34 البصائر والذخائر