حَدَّثَنِي مَالِكٌ، عَنْ نَافِعٍ، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، دَبَّرَ جَارِيَتَيْنِ لَهُ فَكَانَ يَطَؤُهُمَا وَهُمَا مُدَبَّرَتَانِ ‏.‏

Malik related to me from Nafi that Abdullah ibn Umar made two ofhis slave-girls mudabbara, and he had intercourse with them while theywere mudabbara. Translation Not Available

Book Ref: Muwatta Imam Malik Book 40 Hadith 1500
Web Ref:  Muwatta Imam Malik Book 40 Hadith 4

---