Bukhari Collection: ::Book Number 7:: Hadith # 145
Narrated Ibn `Abbas:that `Umar entered upon Hafsa and said, "O my daughter! Do not be misled by the manners of her who is proud of her beauty because of the love of Allah's Apostle for her." By 'her' he meant `Aisha. `Umar added, "Then I told that to Allah's Apostle and he smiled (on hearing that).