Muwatta Malik #1630
Hudud
The Arabic includes the chain of narration (sanad) and the collector's commentary; the English translation shows the Prophet's words only.
حَدَّثَنِي مَالِكٌ، عَنْ يَحْيَى بْنِ سَعِيدٍ، أَنَّ سُلَيْمَانَ بْنَ يَسَارٍ، أَخْبَرَهُ أَنَّ عَبْدَ اللَّهِ بْنَ عَيَّاشِ بْنِ أَبِي رَبِيعَةَ الْمَخْزُومِيَّ قَالَ أَمَرَنِي عُمَرُ بْنُ الْخَطَّابِ فِي فِتْيَةٍ مِنْ قُرَيْشٍ فَجَلَدْنَا وَلاَئِدَ مِنْ وَلاَئِدِ الإِمَارَةِ خَمْسِينَ خَمْسِينَ فِي الزِّنَا .
Malik related to me from Yahya ibn Said that Sulayman ibn Yasar
informed him that Abdullah ibn Abbas ibn Abi Rabia al-Makhzumi said,
"Umar ibn al-Khattab gave me orders about the slaves of Quraysh and we
flogged some of the slave-girls of the muslim lands fifty times each
for fornication."
About Muwatta Malik
This hadith is #1630 from Muwatta Malik, in the Book of Hudud.