Sahih al-Bukhari 3918
Sahih al-Bukhari · Book 63: Merits of the Helpers in Madinah (Ansaar) · The emigration of the Prophet (saws) to Al-Madina
Al-Bara added:
قَالَ الْبَرَاءُ فَدَخَلْتُ مَعَ أَبِي بَكْرٍ عَلَى أَهْلِهِ، فَإِذَا عَائِشَةُ ابْنَتُهُ مُضْطَجِعَةٌ، قَدْ أَصَابَتْهَا حُمَّى، فَرَأَيْتُ أَبَاهَا فَقَبَّلَ خَدَّهَا، وَقَالَ كَيْفَ أَنْتِ يَا بُنَيَّةُ
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?"