Muhakkima

Muḥakkima (Arabic: محكّمة) and al-Haruriyya (Arabic: الحرورية) refer to the Muslims who rejected arbitration between Ali and Mu'awiya I at the Battle of Siffin in 657 CE. The name Muḥakkima derives from their slogan lā ḥukma illā li-llāh (لا حكم إلا لله), meaning "no judgment (hukm) except God's". The name al-Haruriyya refers to their withdrawal from Ali's army to the village of Harura' near Kufa. This episode marked the start of the Kharijite movement, and the term muḥakkima is often also applied by extension to later Kharijites.

In recent times, some adherents of Ibadi Islam, which is commonly identified as a moderate offshoot of the Kharijite movement, have argued that the precursors of both Ibadism and extremist Kharijite sects should be properly called Muḥakkima and al-Haruriyya rather than Kharijites.