Language:
كتاب الحدود
86  
Limits and Punishments set by Allah (Hudood)
(43)
Chapter: To behave in a suspicious and dishonest way; and to accuse others without proof
(43)
باب مَنْ أَظْهَرَ الْفَاحِشَةَ وَاللَّطْخَ وَالتُّهَمَةَ بِغَيْرِ بَيِّنَةٍ
Sahih al-Bukhari 6855

Narrated Al-Qasim bin Muhammad:

Ibn `Abbas mentioned the couple who had taken the oath of Lian. `Abdullah bin Shaddad said (to him), "Was this woman about whom Allah's Messenger (ﷺ) said, 'If I were ever to stone to death any woman without witnesses. (I would have stoned that woman to death)?' Ibn `Abbas replied," No, that lady exposed herself (by her suspicious behavior).

حَدَّثَنَا عَلِيُّ بْنُ عَبْدِ اللَّهِ، حَدَّثَنَا سُفْيَانُ، حَدَّثَنَا أَبُو الزِّنَادِ، عَنِ الْقَاسِمِ بْنِ مُحَمَّدٍ، قَالَ ذَكَرَ ابْنُ عَبَّاسٍ الْمُتَلاَعِنَيْنِ فَقَالَ عَبْدُ اللَّهِ بْنُ شَدَّادٍ هِيَ الَّتِي قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ لَوْ كُنْتُ رَاجِمًا امْرَأَةً عَنْ غَيْرِ بَيِّنَةٍ ‏"‏‏.‏ قَالَ لاَ، تِلْكَ امْرَأَةٌ أَعْلَنَتْ‏.‏
Reference : Sahih al-Bukhari 6855
In-book reference : Book 86, Hadith 77
USC-MSA web (English) reference : Vol. 8, Book 82, Hadith 838
  (deprecated numbering scheme)