Hadithcore
Hadith #514990

Malik related to me from Nafi that Abdullah ibn Umar made two of his slave-girls mudabbara, and he had intercourse with them while they were mudabbara.

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

References1 variant
Arabic/English book reference
Book 40, Hadith 4