Which article of the US Constitution discusses the electoral college?

Article II of the

United States Constitution states that "Each State shall appoint,

in such Manner as the Legislature thereof may direct, a Number of

Electors, equal to the whole Number of Senators and Representatives

to which the State may be entitled in the Congress: but no Senator

or Representative, or Person holding an Office of Trust or Profit

under the United States, shall be appointed an Elector."