It is narrated from Sayyiduna Ammar bin Yasir (may Allah be pleased with both of them), he said: Whoever beats his slave unjustly, retribution will surely be taken from him on the Day of Resurrection.
Hadith Referenceالادب المفرد / كتاب / 181
Hadith Gradingالألبانی:صحيح
Hadith Takhrij«صحيح : أخرجه عبدالرزاق : 17954 و ابن أبى شيبة : 25461 و ابن أبى الدنيا فى الاهوال : 268 و البزار : 236/4»