Sahih Bukhari
Companions of the Prophet
Volume: 005 / Book Number: 057 / Hadith Number: 116
Narrated Abu Wail:
When 'Ali sent 'Ammar and Al-Hasan to (the people of) Kufa to urge them to fight, 'Ammar addressed them saying, "I know that she (i.e. 'Aisha) is the wife of the Prophet in this world and in the Hereafter (world to come), but Allah has put you to test, whether you will follow Him (i.e. Allah) or her."