Language:
كتاب مناقب الأنصار
63  
Merits of the Helpers in Madinah (Ansaar)
(45)
Chapter: The emigration of the Prophet (saws) to Al-Madina
(45)
باب هِجْرَةُ النَّبِيِّ صلى الله عليه وسلم وَأَصْحَابِهِ إِلَى الْمَدِينَةِ
Sahih al-Bukhari 3918

Al-Bara added:

I then went with Abu Bakr into his home (carrying that saddle) and there I saw his daughter `Aisha Lying in a bed because of heavy fever and I saw her father Abu Bakr kissing her cheek and saying, "How are you, little daughter?"

قَالَ الْبَرَاءُ فَدَخَلْتُ مَعَ أَبِي بَكْرٍ عَلَى أَهْلِهِ، فَإِذَا عَائِشَةُ ابْنَتُهُ مُضْطَجِعَةٌ، قَدْ أَصَابَتْهَا حُمَّى، فَرَأَيْتُ أَبَاهَا فَقَبَّلَ خَدَّهَا، وَقَالَ كَيْفَ أَنْتِ يَا بُنَيَّةُ
Reference : Sahih al-Bukhari 3918
In-book reference : Book 63, Hadith 143
USC-MSA web (English) reference : Vol. 5, Book 58, Hadith 256
  (deprecated numbering scheme)