Language:
كتاب الجنائز
23  
Funerals (Al-Janaa'iz)
(96)
Chapter: The graves of the Prophet (pbuh), Abu Bakr, and Umar Radiyallahu Anhu
(96)
باب مَا جَاءَ فِي قَبْرِ النَّبِيِّ صلى الله عليه وسلم وَأَبِي بَكْرٍ وَعُمَرَ ـ رضى الله عنهما
Sahih al-Bukhari 1391
Aisha narrated that she made a will to `Abdullah bin Zubair, "Do not bury me with them (the Prophet (ﷺ) and his two companions) but bury me with my companions (wives of the Prophet (p.b.u.h) ) in Al-Baqi as I would not like to be looked upon as better than I really am (by being buried near the Prophet)."
وَعَنْ هِشَامٍ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ ـ رضى الله عنها ـ أَنَّهَا أَوْصَتْ عَبْدَ اللَّهِ بْنَ الزُّبَيْرِ ـ رضى الله عنهما ـ لاَ تَدْفِنِّي مَعَهُمْ وَادْفِنِّي مَعَ صَوَاحِبِي بِالْبَقِيعِ، لاَ أُزَكَّى بِهِ أَبَدًا‏.‏
Reference : Sahih al-Bukhari 1391
In-book reference : Book 23, Hadith 145
USC-MSA web (English) reference : Vol. 2, Book 23, Hadith 474
  (deprecated numbering scheme)