Jaiminīya (Talavakāra) Brāhmaṇa 1.31

1.31

saptāhaṃ juhoti
aṣṭāviṃśatirāhutayassaṃpadyante
aṣṭāviṃśatyakṣarā vā uṣṇik
aṣṭāviṃśatirbhṛgvaṅgiraso devāḥ
ta uṣṇihamanvāyattāḥ
tebhya uṣṇigbhṛgvaṅgirobhyo devebhya ekaikenākṣareṇa kāmānnikāmānduhe
evamasmai juhvate duhe
uṣṇihaṃ vai sa chandasāṃ jayati bhṛgvaṅgiraso devāndevānām
bhṛgvaṅgirasāṃ devānāṃ sāyujyaṃ salokatāṃ samabhyārohati ya evaṃ vidvānagnihotraṃ
juhoti

He offers for seven days.
Twenty-eight oblations are completed.
Twenty-eight syllables indeed is the Uṣṇih.
Twenty-eight are the Bhṛgu-Aṅgiras gods;
they are attached to the Uṣṇih.
For them, for the Bhṛgu-Aṅgiras gods, the Uṣṇih milks out desires, wish upon wish, syllable by syllable;
even so she milks for him who makes the offering.
He conquers the Uṣṇih among meters, the Bhṛgu-Aṅgiras gods among gods.
He ascends to union, to co-existence with the Bhṛgu-Aṅgiras gods, who, knowing thus, offers the fire-offering.