Śatapatha Brāhmaṇa ("of a hundred paths") 7.5.2.44

7.5.2.44

yadvevāpasyā apadadhāti | prajāpatervisrastādāpa āyaṃstāsvitāsvaviśadyadaviśattasmādviṃśatistā asyāṅgulibhyo 'dhyasravannanto vā aṅgulayo 'ntata evāsmāttā āpa āyan

And, again, why he lays down the Apasyâh. When Pragâpati was disjointed the water went from him; that being gone, he sank down; and because he sank down (vis), therefore there are twenty (vimsati, viz. such bricks). It flowed from his fingers,--the fingers being the end, it (the water) went from him in the end.