Sahih al-Bukhari, Volume 7, Book 62, Hadith 145 (USC-MSA) ⓘ
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 Messenger for her." By 'her' he meant `Aisha. `Umar added, "Then I told that to Allah's Messenger and he smiled (on hearing that).
حَدَّثَنَا عَبْدُ الْعَزِيزِ بْنُ عَبْدِ اللَّهِ، حَدَّثَنَا سُلَيْمَانُ، عَنْ يَحْيَى، عَنْ عُبَيْدِ بْنِ حُنَيْنٍ، سَمِعَ ابْنَ عَبَّاسٍ، عَنْ عُمَرَ ـ رضى الله عنهم ـ دَخَلَ عَلَى حَفْصَةَ فَقَالَ يَا بُنَيَّةِ لاَ يَغُرَّنَّكِ هَذِهِ الَّتِي أَعْجَبَهَا حُسْنُهَا حُبُّ رَسُولِ اللَّهِ صلى الله عليه وسلم إِيَّاهَا ـ يُرِيدُ عَائِشَةَ ـ فَقَصَصْتُ عَلَى رَسُولِ اللَّهِ صلى الله عليه وسلم فَتَبَسَّمَ.
also referenced under: Book 67, Hadith 151 (In-Book) & Hadith 5218 (DarusSalam)