Sahih al-Bukhari 2233
صحيح البخاري#2233SahihNarrated Zaid bin Khalid and Abu Huraira:that Allah's Messenger (ﷺ) was asked about an unmarried slave-girl who committed illegal sexual intercourse. They heard him saying, "Flog her, and if she commits illegal sexual intercourse after that, flog her again, and on the third (or the fourth) offense, sell her
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 34:179