Jaiminīya (Talavakāra) Brāhmaṇa 1.173

1.173

etadvai yajñaṃ yajamāno duhe
sa heṣṭvaiva śreyānbhavati
yajñāyajñā vo agnaye iti bhavati
eṣa ha vai yajño yajño yadyajñāyajñīyam
yajñaṃ yajñaṃ vahatīti ha vai yajñāyajñīyasya yajñāyajñīyatvam
etena ha sma vai purā sarvāṇi stotrāṇi stuvanti
tadāhurūrdhvā vā ete svargaṃ lokaṃ rohanti ye yajante
ta īśvarāḥ parāñco'tipattoriti tadyajñāyajñīyenopariṣṭātstuvanti
iyaṃ vai yajñāyajñīyam
asyāmevaitatpratitiṣṭhanti
apa upanidhāya stuvanti - agnirvā eṣa vaiśvānaro yadyajñāyajñīyaṃ - tasya
śāntyā apradāhāya
ūrubhyāṃ patnyupapravartayati
agnimeva tadvaiśvānaraṃ śamayati
nagnamivoruṃ kṛtvopapravartayati
nagnamiva hyūruṃ kṛtvā patnī vīryaṃ karoti
tāṃ saṃkhyāpayanti retodheyāya
tadāhurā vā etatpatnyudgātuḥ prajāṃ datte yadvigīte sāmansaṃkhyāpayantīti

Thus the sacrificer milks the sacrifice.
Immediately after sacrificing, he becomes better off.
It is: 'Yajñā-yajñā vo agnaye...'
This is indeed sacrifice after sacrifice, namely the Yajñāyajñīya.
Because it conveys sacrifice after sacrifice, that is the essence of the Yajñāyajñīya's name.
By means of this, in ancient times, they used to praise all the stotras.
Regarding this they say: 'Upward indeed do they ascend to the heavenly world who sacrifice;
they are liable to fall away beyond.' Therefore they praise with the Yajñāyajñīya at the end.
This [earth] is the Yajñāyajñīya.
Upon this [earth] they firmly establish themselves.
Placing water nearby, they praise—for the Yajñāyajñīya is Agni Vaiśvānara—for its appeasement, that it may not burn.
Between her thighs, the wife rolls [a vessel of water] forward.
Thereby she appeases Agni Vaiśvānara.
Uncovering her thigh, as it were, she rolls it forward.
For having uncovered her thigh, as it were, the wife produces vital power.
They make her look [at it] for the depositing of seed.
Regarding this they say: 'The wife takes away the Udgātṛ's offspring when they make her look while the sāman is being sung.'