حَدَّثَنِي مَالِكٌ، عَنْ أَبِي الزِّنَادِ، أَنَّهُ قَالَ جَلَدَ عُمَرُ بْنُ عَبْدِ الْعَزِيزِ عَبْدًا فِي فِرْيَةٍ ثَمَانِينَ ‏.‏ قَالَ أَبُو الزِّنَادِ فَسَأَلْتُ عَبْدَ اللَّهِ بْنَ عَامِرِ بْنِ رَبِيعَةَ عَنْ ذَلِكَ فَقَالَ أَدْرَكْتُ عُمَرَ بْنَ الْخَطَّابِ وَعُثْمَانَ بْنَ عَفَّانَ وَالْخُلَفَاءَ هَلُمَّ جَرًّا فَمَا رَأَيْتُ أَحَدًا جَلَدَ عَبْدًا فِي فِرْيَةٍ أَكْثَرَ مِنْ أَرْبَعِينَ ‏.‏

Malik related to me from Abu'z-Zinad that he said, ''Umar ibn Abdal-Aziz flogged a slave with eighty lashes for slander." Abu'z-Zinad said, "I asked Abdullah ibn Amir ibn Rabia about that. Hesaid, 'I saw Umar ibn al-Khattab, Uthman ibn Affan, the Khalifs, andso on, and I did not see any of them flog a slave more than fortylashes for slander.' " Translation Not Available

Book Ref: Muwatta Imam Malik Book 41 Hadith 1519
Web Ref:  Muwatta Imam Malik Book 41 Hadith 17