Śatapatha Brāhmaṇa ("of a hundred paths") 2.6.3.4

2.6.3.4

athaitānyeva pañca havīṃṣi bhavanti | etairvai havirbhiḥ prajāpatiḥ prajā asṛjataitairubhayato varuṇapāśātprajāḥ prāmuñcadetairvai devā vṛtramaghnannetairveva vyajayanta yeyameṣāṃ vijitistāṃ tatho evaiṣa etairyā caiva devānāṃ śrīrāsītsākamedhairījānānāṃ vijigyānānāṃ ya u ca saṃvatsarasya prajitasya rasa āsīttamevaitadubhayam parigṛhyātman kurute tasmādvā etāni pañca havīṃṣi bhavanti

Then, in the first place, there are those five (regular) oblations. By means of these oblations, indeed, Pragâpati produced creatures; with them he delivered the creatures both ways from Varuna's noose; with them the gods slew Vritra and gained that victory which was gained by them. And so does he, by means of them, obtain and make his own, both that prosperity which accrued to the gods from performing the Sâkamedha offerings, and that essence of the year which was gained by them. This is why those five oblations are (offered).