Verse 38

अनाहते पात्रकर्णे ऽभग्नशब्दे सरिद्द्रुते ।शब्दब्रह्मणि निष्णातः परम् ब्रह्माधिगच्छति

In plain words

Steep yourself in the , the unstruck sound whose vessel is the ear, unbroken, running like a river, and you reach the supreme .