Sayyiduna Ammar bin Yasir (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "Whoever strikes his slave, on the Day of Resurrection that slave will be given retribution from him."
Imam al-Bazzar recorded it, and its narrators are thiqat (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب البعث / 18412