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كتاب الرقاق
81  
To make the Heart Tender (Ar-Riqaq)
(18)
Chapter: The adoption of a middle course, and the regularity of deeds
(18)
باب الْقَصْدِ وَالْمُدَاوَمَةِ عَلَى الْعَمَلِ
Sahih al-Bukhari 6466

Narrated 'Alqama:

I asked `Aisha, mother of the believers, "O mother of the believers! How were the deeds of the Prophet? Did he use to do extra deeds of worship on special days?" She said, "No, but his deeds were regular and constant, and who among you is able to do what the Prophet (ﷺ) was able to do (i.e. in worshipping Allah)?"

حَدَّثَنِي عُثْمَانُ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا جَرِيرٌ، عَنْ مَنْصُورٍ، عَنْ إِبْرَاهِيمَ، عَنْ عَلْقَمَةَ، قَالَ سَأَلْتُ أُمَّ الْمُؤْمِنِينَ عَائِشَةَ قُلْتُ يَا أُمَّ الْمُؤْمِنِينَ كَيْفَ كَانَ عَمَلُ النَّبِيِّ صلى الله عليه وسلم هَلْ كَانَ يَخُصُّ شَيْئًا مِنَ الأَيَّامِ قَالَتْ لاَ، كَانَ عَمَلُهُ دِيمَةً، وَأَيُّكُمْ يَسْتَطِيعُ مَا كَانَ النَّبِيُّ صلى الله عليه وسلم يَسْتَطِيعُ‏.‏
Reference : Sahih al-Bukhari 6466
In-book reference : Book 81, Hadith 55
USC-MSA web (English) reference : Vol. 8, Book 76, Hadith 473
  (deprecated numbering scheme)