Śatapatha Brāhmaṇa ("of a hundred paths") 5.2.3.2

5.2.3.2

atha śvo bhūte | anumatyai haviraṣṭākapālam puroḍāśaṃ nirvapati sa ye jaghanena śamyām piṣyamāṇānāmavaśīyante piṣṭāni vā taṇḍulā vā tāntsruve sārdhaṃ saṃvapatyanvāhāryapacanādulmukamādadate tena dakṣiṇā yanti sa yatra svakṛtaṃ veriṇaṃ vindati śvabhrapradaraṃ vā

And on the following day he prepares a cake on eight potsherds, as sacrificial food for Anumati. And whatever portion of (the grains) being ground,--either flour or rice-grains,--falls down behind the pin, that he throws together into the dipping-spoon (sruva). They take a firebrand from the Anvâhâryapakana (or southern) fire, and therewith go southward. And where he finds a self-produced hollow or cleft,--