Shatapatha Brahmana 1.6.3.5

1.6.3.5

atha yadanyasmā aśanāyāsa | tatastittiriḥ samabhavattasmātsa viśvarūpatama iva santyeva ghṛstokā iva tvanmadhustokā iva tvatparṇeṣvāścutitā evaṃ rūpaṃ hi sa tenāśanamāvayat

Then from the one which served for other kinds of food, a partridge sprang; whence the latter is much variegated in colour: on its wings, namely, butter-drops, as it were, have dropped in one place and honey- (or mead-) drops in another, for suchlike, as it were, was the food which he consumed with that (mouth).