Śatapatha Brāhmaṇa ("of a hundred paths") 8.2.2.9

8.2.2.9

sajūrvasubhiriti dakṣiṇataḥ | tadvasūnprājanayatsajū rudrairiti paścāttadrudrānprājanayatsajūrādityairityuttaratastadādityānprājanayatsajūrviśvairdeva irityupariṣṭāttadviśvāndevānprājanayattā vai samānaprabhṛtayaḥ samānodarkā nānā madhyatastā yatsamānaprabhṛtayaḥ samānībhirhi devatābhiḥ purastāccopariṣṭācca sayugbhūtvā prājanayadatha yannānā madhyato 'nyā-anyā hi prajā madhyataḥ prājanayat

'In union with the Vasus,' he says on the right side: he thereby produced the Vasus;--'in union with the Rudras,' he says at the back: he thereby produced the Rudras;--'in union with the Âdityas,' he says on the left side: he thereby produced the Âdityas;--'in union with the All-gods,' he says upwards: he thereby produced the All-gods. These (bricks) have the same beginning and end, but are different in the middle: as to their having the same beginning and end, it is because having become united with the deities in front and behind, he produced creatures; and as to their being different in the middle, it is that each time he produced different creatures from within him.