Śatapatha Brāhmaṇa ("of a hundred paths") 1.1.2.10

1.1.2.10

sa dhuramabhimṛśati | dhūrasi dhūrva dhūrvantaṃ dhūrva taṃ yo 'smāndhūrvati taṃ dhūrvayaṃ vayaṃ dhūrvāma ityagnirvā eṣa dhuryastametadatyeṣyanbhavati havirgrahiṣyaṃstasmāevaitānnihnute tatho haitameṣo 'tiyantamagnirdhuryo na hinasti

He now touches the yoke, with the text (Vâg. S. I, 8 a): 'Thou art the yoke (dhur); injure (dhûrv) thou the injurer! injure him that injures us! injure him whom we injure!' For there being a fire in the yoke by which he will have to pass when he fetches the material for the oblation, he thereby propitiates it, and thus that fire in the yoke does not injure him when he passes by.