Hasan al-Basri (may Allah have mercy on him) said: "Whoever commits fornication with a slave woman and then buys her, it was considered disliked to have relations with her."
Hadith Referenceسنن سعید بن منصور / كتاب الطلاق / 3215
Hadith Takhrij«أخرجه سعيد بن منصور فى «سننه» ترقيم الدرالسلفية برقم:، 2010، 2038»