Sayyiduna Abu Hurayrah (may Allah be pleased with him) said: I heard the Prophet (peace and blessings be upon him) say: "Any man who accuses his slave, male or female, (of adultery) while the slave is innocent of what he said, the prescribed punishment will be applied to him on the Day of Resurrection, if (the slave) was not as he said."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحدود / 17130