अयं स्तनयित्नुः सर्वेषां भुतानां मधु ।अस्य स्तनयित्नोः सर्वाणि भूतानि मधु ।यश्चायमस्मिन्स्तनयित्नौ तेजोमयोऽमृतमयः पुरुषो यश्चायमध्यात्मं शाब्दः सौवरस्तेजोमयोऽमृतमयः पुरुषोऽयमेव स योऽयमात्मा ।इदममृतमिदं ब्रह्मेदं सर्वम् ॥२,५.९ ॥
In plain words
This thunder is the honey of all beings, and all beings are the honey of this thunder. And the shining, immortal person who is in this thunder, and the shining, immortal person here in sound and in tone — he is this Self. This is the immortal, this is Brahman, this is all.
The commentators
Bṛhadāraṇyakopaniṣadbhāṣyam· bhāṣya
तथा स्तनयित्नुः । शब्दे भवः शाब्दः अध्यात्मं यद्यपि, तथापि स्वरे विशेषतो भवतीति सौवरः अध्यात्मम् ॥
In plain words
It is the same with thunder. What is born in sound is, in general, your inward counterpart — but it shows up most sharply in tone itself. So the more exact name for it, within you, is the tonal one.
Close to the Sanskrit
So too the thunder. In sound, the śābda [sound-born one] is, with reference to the self, though [it is present generally]; nevertheless, since it becomes especially [present] in tone, the tonal one [sauvara] is [named] with reference to the self.