Musannaf Ibn Abi Shayba 38:7

Yazid ibn Harun narrated to us, from Sharik, from Abu al-Anbas, from Abu al-Bakhtari, who said: Ali was asked about the people of the Camel. It was said: "Are they polytheists?" He said: "From polytheism they fled." It was said: "Are they hypocrites?" He said: "Indeed, the hypocrites do not remember Allah except a little." It was said: "They are our brothers who transgressed against us."