Śatapatha Brāhmaṇa ("of a hundred paths") 7.5.1.28

7.5.1.28

athopaśayām piṣṭvā | lokabhājamukhāṃ kṛtvā purastādukhāyā upanivapatyeṣa haitasyai lokastatho hāsyaiṣānantaritā bhavati

Thereupon, having pounded the remainder (of the clay), and having put the fire-pan in its place, he throws (the pounded clay) in front of the fire-pan; for this is the place of that (remainder), and thus that (remainder) is not separated therefrom.