Anas b. Malik narrates from Ayesha - I heard the Messenger of Allah (s.a.w.a.) say that Ali is the best human being. Those who deny this are apostates (Kafir)
So people asked her – Why did you go to war with him?
Ayesha replied – I did not do this out of my own inclination. It was Talha and Zubair who made me fight him.
Behaar al-Anwaar v 26 p 306 from Al-Mohtazar p 551
Is Ayesha Ummul Momineen?? (Interesting Article)
http://www.seratonline.com/23127/ayesha-is-not-the-mother-of-believers/