Śatapatha Brāhmaṇa ("of a hundred paths") 13.6.2.2

13.6.2.2

tānvai madhyame'hannālabhate antarikṣam vai madhyamamaharantarikṣamu vai sarveṣām bhūtānāmāyatanamatho annam vā ete paśava udaram madhyamamaharudare tadannaṃ dadhāti

He seizes them on the central day, for the central day is the air, and the air is the abode of all beings; and, indeed, these victims are also food, and the central day is the belly: he thus puts food in the belly.