Article I Section 7

All bills for raising Revenue shall originate in the House of
Representatives; but the Senate may propose or concur with Amendments as on
other Bills. 

Every Bill which shall have passed the House of Representatives and the
Senate, shall, before it become a Law, be presented to the President of the
United States; If he approve he shall sign it, but if not he shall return it,
with his Objections to that House in which it shall have originated, who
shall enter the Objections at large on their Journal, and proceed to
reconsider it. If after such Reconsideration two thirds of that House shall
agree to pass the Bill, it shall be sent, together with the Objections, to
the other House, by which it shall likewise be reconsidered, and if approved
by two thirds of that House, it shall become a Law. But in all such Cases the
Votes of both Houses shall be determined by Yeas and Nays, and the Names of
the Persons voting for and against the Bill shall be entered on the Journal
of each House respectively. If any Bill shall not be returned by the
President within ten Days (Sundays excepted) after it shall have been
presented to him, the Same shall be a Law, in like Manner as if he had signed
it, unless the Congress by their Adjournment prevent its Return, in which
Case it shall not be a Law. 

Every Order, Resolution, or Vote to which the Concurrence of the Senate and
House of Representatives may be necessary (except on a question of
Adjournment) shall be presented to the President of the United States; and
before the Same shall take Effect, shall be approved by him, or being
disapproved by him, shall be repassed by two thirds of the Senate and House
of Representatives, according to the Rules and Limitations prescribed in the
Case of a Bill.