Ubaydullah bin Umar (may Allah have mercy on him) says that a man asked al-Qasim bin Muhammad (may Allah have mercy on him) about singing, and he said: I forbid you from it and I dislike it. The man said: Is it forbidden? He said: O son of my brother, when Allah Almighty distinguishes truth from falsehood, in which pan of the scale will He place singing?
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشهادات / 21011