The Creation Mandate

If an effect would put one or more tokens onto the battlefield under your control, it puts twice that
many of those tokens onto the battlefield instead.

"And God blessed them. And God said to them:
'Be fruitful and multiply and fill the earth and
subdue it, and have dominion over the fish of
the sea and over the birds of the heavens and over
every living thing that moves on the earth.'"
–Gen.1:28