Shatapatha Brahmana 2.2.4.5

2.2.4.5

sā hainaṃ nābhirādhayāṃ cakāra | keṣamiśreva hāsa tāṃ vyaukṣadoṣa dhayeti tata oṣadhayaḥ samabhavaṃstasmādoṣadhayo nāma sa dvitīyamudamṛṣṭa tatrāparāmāhutiṃ viveda ghṛtāhutiṃ vaiva payāahutiṃ vobhayaṃ ha tveva tatpaya eva

This (offering), however, did not satisfy him, because it had hairs mixed with it. He poured it away (into the fire), saying, 'Drink, while burning (osham dhaya)!' From it plants sprang: hence their name 'plants (oshadhayah).' He rubbed (his hands) a second time, and thereby obtained another offering, either a butter-offering or a milk-offering;--but, indeed, they are both milk.