Śatapatha Brāhmaṇa ("of a hundred paths") 8.2.1.5

8.2.1.5

kulāyinī ghṛtavatī puraṃdhiriti | kulāyamiva vai dvitīyā citiḥ syone sīda sadane pṛthivyā iti pṛthivī vai prathamā citistasyai śive syone sīda sadana ityetadabhi tvā rudrā vasavo gṛṇantvityetāstvāṃ devatā abhigṛṇantvityetadimā brahma pīpihi saubhagāyetīmā brahmāva saubhagāyetyetadaśvinādhvaryū sādayatāmiha tvetyaśvinau hyadhvaryū upādhattām

[The second Âsvinî he lays down, with Vâg. S. XIV, 2], 'Nest-like, fat, wise,'--a nest, as it were, is indeed the second layer;--'seat thee in the soft seat of the earth!'--the second layer, no doubt, is the earth: thus, 'Sit on her pleasant seat!'--'May the Rudras, the Vasus sing thy praises!'--that is, 'May those deities sing thy praises!'--'Replenish them, O Brahman, for happiness!'--that is, 'Favour them, O Brahman, with a view to happiness.'--'May the Asvins, the Adhvaryus, settle thee here!' for the Asvins, as Adhvaryus, did lay down (this brick).