Umm
10th Ammendment:
The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people.
So what don't you get? You already ackowledge that the constitution does not mention much less delegate any such power to the federal gov't nor does it prohibit the states. Therefore, the power is reserved to the States respectively, or to the people.