وَحَدَّثَنِي عَنِ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، أَنَّهُ سُئِلَ عَنْ حَدِّ الْعَبْدِ، فِي الْخَمْرِ فَقَالَ بَلَغَنِي أَنَّ عَلَيْهِ نِصْفَ حَدِّ الْحُرِّ فِي الْخَمْرِ وَأَنَّ عُمَرَ بْنَ الْخَطَّابِ وَعُثْمَانَ بْنَ عَفَّانَ وَعَبْدَ اللَّهِ بْنَ عُمَرَ قَدْ جَلَدُوا عَبِيدَهُمْ نِصْفَ حَدِّ الْحُرِّ فِي الْخَمْرِ ‏.‏

Yahya related to me from Malik from Ibn Shihab that he was askedabout the hadd of the slave for wine. He said, "I heard that he hashalf the hadd of a freeman for drinking wine. Umar ibn al-Khattab,Uthman ibn Affan, and Abdullah ibn Umar flogged their slaves with halfof the hadd of a freeman when they drank wine." Translation Not Available

Book Ref: Muwatta Imam Malik Book 42 Hadith 1542
Web Ref:  Muwatta Imam Malik Book 42 Hadith 3