Sahih Bukhari Volume 9, Book 88, Hadith Number 220.

Narrated By Abu Maryam Abdullah bin Ziyad Al-Aasadi : When Talha, AzZubair and ‘Aisha moved to Basra, ‘Ali sent ‘Ammar bin Yasir and Hasan bin ‘Ali who came to us at Kufa and ascended the pulpit. Al-Hasan bin ‘Ali was at the top of the pulpit and ‘Ammar was below Al-Hasan. We all gathered before him. I heard ‘Ammar saying, “‘Aisha has moved to Al-Busra. By Allah! She is the wife of your Prophet in this world and in the Hereafter. But Allah has put you to test whether you obey Him (Allah) or her (‘Aisha).”