Śatapatha Brāhmaṇa ("of a hundred paths") 8.1.2.5

8.1.2.5

tasya śrotraṃ sauvamiti | śrotraṃ tasmādrūpāddigbhyo niramimīta śaracrautrīti śaradamṛtuṃ śrotrānniramimītānuṣṭupśāradītyanuṣṭubhaṃ candaḥ śarada ṛtorniramimītānuṣṭubha aiḍamityanuṣṭubhaścandasa aiḍaṃ sāma niramimītaiḍānmanthītyaiḍātsāmno manthinaṃ grahaṃ niramimīta manthina ekaviṃśa iti manthino grahādekaviṃśaṃ stomaṃ niramimītaikaviṃśādvairājamityekaviṃśātstomādvairājam pṛṣṭhaṃ niramimīta

'Its, heaven's, child, the Ear,'--from out of that form, the regions, he fashioned the ear;--'the autumn, the daughter of the ear,'--from out of the ear he fashioned the autumn season;--'Anushtubh, the daughter of the autumn,'--from out of the autumn season he fashioned the Anushtubh metre;--'from the Anushtubh the Aida,'--from out of the Anushtubh metre he fashioned the Aida-sâman;--'from the Aida the Manthin,'--from out of the Aida-sâman he fashioned the Manthin cup;--'from the Manthin the Ekavimsa,'--from out of the Manthi-graha he fashioned the twenty-one-versed hymn-form;--'from the Ekavimsa the Vairâga,'--from out of the Ekavimsa-stoma he fashioned the Vairâga-prishtha.