 the statement of ibn mas`ud and singing causes hypocrisy to grow in the heart is narrated with a broken chain of transmission and with a chain of transmission traceable back to the prophet. it was cited by ibn abi aldunya and ibn aljawzi who added to it just as water causes grass to grow. ibn alqaysarani included it with a chain of transmission traceable back to abu hurayrah i.e. from a chain of transmission other than that of ibn mas`ud. in its chain of transmission is abd alrahman ibn abd allah al`umari about whom ahmad ibn hanbal says his hadith is worth nothing. we burned his hadith… his hadiths are objectionable and he was a liar. then he included it from the chain of transmission of ibn mas`ud and said salaam narrated it from an unknown sheikh. this is exactly what ibn hazm said.
٤ قول ابن مسعود والغناء ينبت النفاق في القلب يروى منقطعا ومرفوعا؛ وقد استشهد به ابن أبي الدنيا وابن الجوزي وزاد فيه كما ينبت الماء البقل . وقد أورده ابن القيسراني مسندا إلى أبي هريرة، أي من طريق أخرى غير طريق ابن مسعود، وفي سنده عبد الرحمن بن عبد الله العمري، الذي يقول فيه أحمد بن حنبل لا يسوى حديثه شيئا، حرقنا حديثه.. أحاديثه مناكير وكان كذابا ثم أورده من طريق ابن مسعود وقال رواه سلام عن شيخ مجهول ، وهذا عين ما قاله ابن حزم.