Shatapatha Brahmana 6.2.3.7

6.2.3.7

tadetā vāva ṣaḍ devatāḥ | idaṃ sarvamabhavanyadidaṃ kiṃ ca te devāśca 'rṣayaścābruvannimā vāva ṣaḍ devatā idaṃ sarvamabhūvannupa tajjānīta yathā vayamihāpyasāmeti te 'bruvaṃścetagradhvamiti citimicateti vāva tadabruvaṃstadicata yathā vayamihāpyasāmeti teṣāṃ cetayamānānāṃ devā dvitīyāṃ citimapaśyannṛṣayaścaturthīm

These six deities forsooth became all this (universe), whatsoever exists here. The gods and the Rishis said, 'Those six deities forsooth have become all this (universe): bethink ye yourselves how we also may share therein!' They said, 'Meditate ye!' whereby doubtless they meant to say, 'Seek ye a layer! seek ye how we also may share in this! Whilst they were meditating, the gods saw a second, the Rishis a fourth, layer.