(13) Marriage
كتاب النكاح
(17a) Chapter: Maintenance, and a Slave’s Rights - Section 1
(17) باب النفقات وحق المملوك - الفصل الأول
Mishkat al-Masabih 3352 
Ibn ‘Umar told that he heard God’s Messenger say, “If anyone beats a servant for an offence he did not commit, or slaps him, the atonement due from him is to set him free.” Muslim transmitted it.
وَعَنِ ابْنِ عُمَرَ قَالَ: سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَقُولُ: «مَنْ ضَرَبَ غُلَامًا لَهُ حَدًّا لَمْ يَأْتِهِ أَوْ لَطَمَهُ فَإِن كَفَّارَته أَن يعتقهُ» . رَوَاهُ مُسلم
 صَحِيح  (الألباني)حكم :
Reference : Mishkat al-Masabih 3352
In-book reference : Book 13, Hadith 266