Language:
كتاب الوكالة
40  
Representation, Authorization, Business by Proxy
(13)
Chapter: To depute a person to carry out a punishment
(13)
باب الْوَكَالَةِ فِي الْحُدُودِ
Sahih al-Bukhari 2314, 2315

Narrated Zaid bin Khalid and Abu Huraira:

The Prophet (ﷺ) said, "O Unais! Go to the wife of this (man) and if she confesses (that she has committed illegal sexual intercourse), then stone her to death."

حَدَّثَنَا أَبُو الْوَلِيدِ، أَخْبَرَنَا اللَّيْثُ، عَنِ ابْنِ شِهَابٍ، عَنْ عُبَيْدِ اللَّهِ، عَنْ زَيْدِ بْنِ خَالِدٍ، وَأَبِي، هُرَيْرَةَ رضى الله عنهما عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ ‏ "‏ وَاغْدُ يَا أُنَيْسُ إِلَى امْرَأَةِ هَذَا، فَإِنِ اعْتَرَفَتْ فَارْجُمْهَا ‏"‏‏.‏
Reference : Sahih al-Bukhari 2314, 2315
In-book reference : Book 40, Hadith 14
USC-MSA web (English) reference : Vol. 3, Book 38, Hadith 508
  (deprecated numbering scheme)