Compiled by Imam Yahya ibn Sharaf al-Nawawi
وعنه قال: سمعت رسول الله صلى الله عليه وسلم يقول: "من قذف مملوكه بالزنا يقام عليه الحد يوم القيامة، إلا أن يكون كما قال" ((متفق عليه)).
I heard the Messenger of Allah (ﷺ) saying, "He who accuses his slave of Zina will receive the punishment (Hadd) of slander on the Day of Resurrection, unless the accusation of Zina was true."[Al- Bukhari and Muslim].