U.S. Constitution - Article 3 Section 1
Article 3 - The Judicial Branch
Section 1 - Judicial Powers
The judicial Power of the United States, shall be vested in one supreme Court, and in such inferior Courts as the Congress may from time to time ordain and establish. The Judges, both of the supreme and inferior Courts, shall hold their Offices during good Behavior, and shall, at stated Times, receive for their Services a Compensation which shall not be diminished during their Continuance in Office.
Notes for this section:
Separation of Powers