Śatapatha Brāhmaṇa ("of a hundred paths") 4.6.9.23

4.6.9.23

te 'stamite prāñca upaniṣkrāmanti | te jaghanenāhavanīyamāsate 'greṇa havirdhāne tānvācaṃyamāneva vācaṃyamaḥ pratirasthātā vasatīvarībhirabhipariharati te yatkāmā āsīraṃstena vācaṃ visṛjerankāmairha sma vai purarṣayaḥ sattramāsate 'sau naḥ kāmaḥ sa naḥ samṛdhyatāmiti yadyu anekakāmāḥ syurlokakāmā vā prajākāmā vā paśukāmā vā

When the sun has set, they go out (of the Sadas) eastward, and sit down behind the Âhavanîya, in front of the Havirdhâna shed. Round them, sitting speechless, the Pratiprasthâtri carries the Vasatîvarî water. For whatever object they perform the session, therewith let them release their speech. For in olden times the Rishis were wont to hold sacrificial sessions for certain objects,--'such is our wish: may that be fulfilled!' And if they be desirous of different objects, desirous of subjects, desirous of offspring, desirous of cattle,--