Shatapatha Brahmana 2.5.2.7

2.5.2.7

athaitānyeva pañca havīṃṣi bhavanti | etairvai havirbhiḥ prajāpatiḥ prajā asṛjataitairubhayato varuṇapāśātprajāḥ prāmuñcaditaścordhvā itaścāvācīstasmādvā etāni pañca havīṃṣi bhavanti

In the first place there are those five oblations. For by means of those five oblations Pragâpati produced the creatures, with them he freed the creatures both ways from Varuna's noose,--on the one side (he freed) the upright, and on the other those that tend to the ground: this is why there are those five oblations.