(36) باب لاَ يُثَرَّبُ عَلَى الأَمَةِ إِذَا زَنَتْ وَلاَ تُنْفَى
Narrated Abu Huraira:
The Prophet (ﷺ) said, "If a lady slave commits illegal sexual intercourse and she is proved guilty of illegal sexual intercourse, then she should be flogged (fifty stripes) but she should not be admonished; and if she commits illegal sexual intercourse again, then she should be flogged again but should not be admonished; and if she commits illegal sexual intercourse for the third time, then she should be sold even for a hair rope."
Reference: Sahih al-Bukhari 6839
In-book reference: Book 86, Hadith 63
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 8, Book 82, Hadith 823