Śatapatha Brāhmaṇa ("of a hundred paths") 6.3.3.15

6.3.3.15

athopaviśya mṛdamabhijuhoti | etadvai devā abruvaṃścetayadhvamiti citimicrateti vāva tadabruvaṃste cetayamānā etāmāhutimapaśyaṃstāmajuhavustāṃ hutvemāṃlokānukhāmapaśyan

Sitting down he now offers upon the lump of clay;--for the gods then said, 'Meditate ye (ketay),' whereby, doubtless, they meant to say, 'Seek ye a layer (kiti)!' Whilst meditating they saw this libation, and offered it: after offering it, they saw the fire-pan (representing) these worlds.