Śatapatha Brāhmaṇa ("of a hundred paths") 6.2.1.17

6.2.1.17

tadyadagnibhya iti | bahavo hyete 'gnayo yadetāścitayo 'tha yatkāmāyeti yathā taṃ kāmamāpnuyādyajamāno yatkāma etatkarma kurute

And when (he offers) 'to the Agnis,'--it is because there are here many Agnis, to wit, those layers; and when (he offers) 'to the desire,' it is in order that the Sacrificer may obtain the object for which he performs that ceremony.