In the preamble of the U.S. Constitution
The 
Senate of the United States shall be composed of two Senators from each State,
... [DOC] [TLE] Avalon Project - Constitution of the United States : Preamble [PAR] We, the people of the United States, in order to form a more perfect Union, 
establish justice, insure domestic tranquility, provide for the common defense,... [DOC] [TLE] A Summary of the US Constitution The Preamble The Seven Articles ... [PAR] Summary of the US Constitution.