It is narrated from Sayyiduna Abu Umamah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "It is not lawful to buy or sell singing slave-girls, nor is trading in them permissible, and their prices are unlawful, and nor is (it permissible) to take enjoyment in them."
Hadith Referenceالمعجم الكبير للطبراني / باب الصاد / 7774