釋氏要覽 2.129

2.129

若今唱曲子之類也。律云。有五過一使自心貪。二令他起著。三獨處多起覺觀。四常為貪欲覆心。五令諸年少聞常起愛欲反道故。

Similar to singing popular songs today. The Vinaya says: 'There are five faults: first, it makes one's own mind greedy; second, it causes others to arouse attachment; third, dwelling alone, it generates excessive discursive thinking; fourth, the mind is constantly veiled by covetous desire; fifth, it causes youth who hear it to constantly arouse lust, running contrary to the Way.'