Arabic hadith text
حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ أَنَّ عَبْدَ اللَّهِ بْنَ عَبَّاسٍ، وَعَبْدَ اللَّهِ بْنَ عُمَرُ، سُئِلاَ عَنْ رَجُلٍ، كَانَتْ تَحْتَهُ امْرَأَةٌ حُرَّةٌ فَأَرَادَ أَنْ يَنْكِحَ عَلَيْهَا أَمَةً فَكَرِهَا أَنْ يَجْمَعَ بَيْنَهُمَا ‏.‏
Translation

Yahya related to me from Malik that he had heard that Abdullahibn Abbas and Abdullah ibn Umar were asked about a man who had a freewoman as a wife and then wanted to marry a slave-girl. Theydisapproved that he should combine the two of them.