عَنْ أَبِي ذَرٍّ رَضِيَ اللَّهُ عَنْهُ قَالَ سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ يَقُولُ مَنْ زَنَّى أَمَةً لَمْ يَرَهَا تَزْنِي جَلَدَهُ اللَّهُ يَوْمَ الْقِيَامَةِ بِسَوْطٍ مِنْ نَارٍ
It is narrated from Sayyiduna Abu Dharr (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: Whoever does not see his slave-girl committing adultery, yet still accuses her of adultery, Allah Almighty will strike that person with a whip of fire on the Day of Resurrection.