(64) باب هَلْ يَزُورُ صَاحِبَهُ كُلَّ يَوْمٍ أَوْ بُكْرَةً وَعَشِيًّا
Narrated `Aisha:
(the wife of the Prophet) "I do not remember my parents believing in any religion other than the Religion (of Islam), and our being visited by Allah's Messenger (ﷺ) in the morning and in the evening. One day, while we were sitting in the house of Abu Bakr (my father) at noon, someone said, 'This is Allah's Messenger (ﷺ) coming at an hour at which he never used to visit us.' Abu Bakr said, 'There must be something very urgent that has brought him at this hour.' The Prophet (ﷺ) said, 'I have been allowed to go out (of Mecca) to migrate.' "
Reference: Sahih al-Bukhari 6079
In-book reference: Book 78, Hadith 107
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 8, Book 73, Hadith 102