Eighth and Ninth Circuits Act of 1837
Be it enacted, by the Senate and House of Representatives of the United States of America in Congress assembled, That the Supreme Court of the United States shall hereafter consist of a chief justice, and eight associate judges, any five of whom shall constitute a quorum; and for this purpose there shall be appointed two additional justices of said court, with the like powers, and to take the same oaths, perform the same duties, and be entitled to the same salary, as the other associate judges.
federal statute