Śatapatha Brāhmaṇa ("of a hundred paths") 4.6.8.16

4.6.8.16

atha yadahareṣāṃ dīkṣā samaiti | gṛhapaterevāraṇyoḥ saṃvadante ya ito 'gnirjaniṣyate sa naḥ saha yadanena yajñena jesyāmo 'nena sattreṇa tannaḥ saha saha naḥ sādhukṛtyā ya eva papaṃ karavattasyaiva tadityevamuktvā gṛhapatireva prathamaḥ samārohayate 'thetarebhyaḥ samārohayati svayaṃ vaiva samārohayante ta āyanti yatra dīkṣiṣyamāṇā bhavanti mathitvopasamādhāyoddhṛtyāhavanīyaṃ dīkṣante teṣāṃ samāna āhavanīyo bhavati samāno gārhapatyo dīkṣopasatsu

And on whatever day their purchase (of Soma-plants) takes place, on that day he piles up the Gârhapatya hearth, and on the Upavasatha day the dhishnya hearths for the others. At the time of the Vaisargina offerings the wives come forward together; and they (the sacrificers) abandon that (Gârhapatya) fire. As soon as the Vaisargina offering has been performed,