Khaṭṭābiyya was the name of a Ghali sect founded by Abu l-Khattab in Kufa.
Abu l-Khattab claimed that Ja'far al-Sadiq, the 6th Imam of Shias, chose him as deputy and legatee (waṣī) and taught him the Greatest Name of God (Al-Ism al-A'zam).
He was among the companions of al-Sadiq first, but then around 748 was rejected and cursed by him for his extremist ideas.
[1][2] Khattabiyyas were known for their beliefs about the divinity of the Islamic prophet Muhammad, his household, and certain other persons.
Ash'ari Writes that Khattabiyas, headed by Abu l-Khattab, believed that there should be two messengers at any time and the earth should not be empty of them: one is talker and the other is silent, according which in the beginning, Muhammad was talker and during his time Ali was silent.