The following three amendments to the Constitution serve to limit federal power:
Tenth Amendment: This amendment states that any powers not delegated to the federal government by the Constitution, nor prohibited to it by the Constitution, are reserved for the states or the people. This amendment serves to limit the federal government's power by specifically reserving certain powers for the states and the people.
Ninth Amendment: This amendment states that the enumeration of certain rights in the Constitution shall not be construed to deny or disparage other rights retained by the people. This amendment serves to limit federal power by making it clear that the federal government cannot infringe upon rights not specifically listed in the Constitution.
Thirteenth Amendment: This amendment prohibits slavery and involuntary servitude, except as a punishment for a crime. This amendment serves to limit federal power by prohibiting the federal government from engaging in or supporting the institution of slavery.