Hisham bin Lahiq narrates from Asim (may Allah have mercy on him) that a man came to al-Hasan (may Allah have mercy on him) and said: O Abu Sa'id, my slave-girl has a beautiful voice; if I teach her singing, I will then earn money through her. Al-Hasan (may Allah have mercy on him) said: "And he used to command his family to pray and give zakah, and he was pleasing to his Lord" [Surah Maryam: 55]: Isma'il used to command his family to pray and give zakah, and he was well-pleasing. Then he kept repeating his words.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشهادات / 21026