Chapter 3 — Part I: The Creed — Article I: I Believe in God, the Father Almighty, Creator of Heaven and Earth
Section 24. This name implies that in the one Essence of the Godhead is proposed to our belief, not only one Person, but a distinction of persons; for in one Divine Nature there are Three Persons-the Father, begotten of none; the Son, begotten of the Father before all ages; the Holy Ghost, proceeding from the Father and the likewise, from all eternity