okay. Where is it in the Constitution?
The part where it says "The enumeration in the Constitution, of certain rights, shall not be construed to deny or disparage others retained by the people."
People have a basic right to be left alone by the government unless they are hurting someone. It's a key conservative principle.
The Constitution does not contain all of our rights. In fact James Madison and other framers specifically did not want the Bill of Rights included in the Constitution, as they worried, correctly, that in the future, people and government would take the position that the rights in the Bill of Rights were our only rights.
OTOH, the Constitution does emumerate specifically the powers of government; what is not enumerated, the government may not do.
The same place the right to own private property is.