He who accused his slave of adultery, punishment would be imposed upon him on the Day of Resurrection, except in case the accusation was as he had said.  

أَبُو الْقَاسِمِ ﷺ مَنْ قَذَفَ مَمْلُوكَهُ بِالزِّنَا يُقَامُ عَلَيْهِ الْحَدُّ يَوْمَ الْقِيَامَةِ إِلاَّ أَنْ يَكُونَ كَمَا قَالَ  

"If somebody slanders his slave (by accusing him of committing illegal sexual intercourse) and the slave is innocent from what he says, Allah will impose the punishment upon him on the Day of Resurrection, unless it is as he said about him."  

أَبُو الْقَاسِمِ ﷺ نَبِيُّ التَّوْبَةِ مَنْ قَذَفَ مَمْلُوكَهُ بَرِيئًا مِمَّا قَالَ لَهُ أَقَامَ عَلَيْهِ الْحَدَّ يَوْمَ الْقِيَامَةِ إِلاَّ أَنْ يَكُونَ كَمَا قَالَ