Malik related to me from Yahya ibn Said that Said ibn al-Musayyabused to say, "When a man makes his slave-girl mudabbara, he can haveintercourse with her. He cannot sell her or give her away and herchildren are in the same position as her." (IT)
USC-MSA web (English) reference: Book 40, Hadith 5 (IT)
Arabic reference (IT): Book 40, Hadith 1501 (IT)