Mallodery is once again flopping around in parsimonious dissection and minutia.

"I think we have more machinery of government than is
necessary, too many parasites living on the labor of the
industrious." --Thomas Jefferson

Society in every state is a blessing, but government, even in its best state, is but a necessary evil; in its worst state an intolerable one.
Thomas Paine, Common Sense, 1776

The powers delegated by the proposed Constitution to the federal government are few and defined. Those which are to remain in the State governments are numerous and indefinite.
James Madison, Federalist No. 45, January 26, 1788

It has been said that all Government is an evil. It would be more proper to say that the necessity of any Government is a misfortune. This necessity however exists; and the problem to be solved is, not what form of Government is perfect, but which of the forms is least imperfect.
James Madison, to an unidentified correspondent, 1833

The two enemies of the people are criminals and government, so let us tie the second down with the chains of the Constitution so the second will not become the legalized version of the first. Thomas Jefferson

"The Tenth Amendment is the foundation of the Constitution."
- Thomas Jefferson

From Cornell University Law School:

Tenth Amendment

So, is it a Washington quote?

I thought you'd figure it out yourself, but no.

A real quote:

Jumbling John Adams

Arms in the hands of citizens may be used at individual discretion...in private self-defense.

The quote above was even mistakenly cited by the NRA-ILA in 1996, and was on the NRA's Web site until at least early 1998 (and has spread to many personal Web pages). (Original NRA page preserved here. The erroneous Adams quote appears near the bottom of the page.)

Less common, and worse:

Arms in the hands of the citizens may be used at individual discretion for the defense of the country, the overthrow of tyranny or private self defense.

The correct quote:

To suppose arms in the hands of citizens, to be used at individual discretion, except in private self-defense, or by partial orders of towns, countries or districts of a state, is to demolish every constitution, and lay the laws prostrate, so that liberty can be enjoyed by no man; it is a dissolution of the government. The fundamental law of the militia is, that it be created, directed and commanded by the laws, and ever for the support of the laws.
         ---John Adams, A Defence of the Constitutions of the United States 475 (1787-1788)

So which of the dozens of internet sources that list it as a George Washington quote do you wish to discount?  What source tells you that it's not a Washington quote?  What does the supposed Adams quote have to do with this?