首楞嚴義疏注經 6.111

6.111

音聲差別三昧能純，塵既不生，根無所偶。順違之境不得，瞋恚之心自亡，故令念者離諸瞋恚。

Distinctions of sounds are made pure through samādhi; since dust does not arise, the faculties have no counterpart. Realms agreeable or contrary cannot be found, and the mind of anger naturally vanishes; therefore, it causes those who remember [me] to leave behind all anger.