Kathir bin Namir said: Sayyiduna Ali (may Allah be pleased with him) was delivering a sermon when a man stood up and said: "There is no judgment except Allah's." Then another stood up, and many people stood up from the corners of the mosque, all of them saying the same. So Sayyiduna Ali (may Allah be pleased with him) said: Sit down. "There is no judgment except Allah's" is a word of truth by which falsehood is intended.
The rest is as in the narration of Imam al-Shafi'i (may Allah have mercy on him) above.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب قتال أهل البغي / 16763