Jaiminīya Upaniṣad Brāhmaṇa 2.2.6

2.2.6

atha yas sa prāṇa āsīt sa prajāpatir abhavat
sa eṣa putrī prajāvān udgītho yaḥ prāṇaḥ
tasya svara eva prajāḥ
prajāvān bhavati ya evaṃ veda /

Then that breath which was there became Prajāpati.
This breath is that udgītha, having sons and having offspring;
its notes are its offspring.
He becomes possessed of offspring who knows thus.