The Solemn League and Covenant; article 2

That we shall in like manner, without respect of persons, endeavour the extirpation of Popery, Prelacy, (that is, Church Government by Archbishops, Bishops, their Chancellours and Commissaries, Deans, Deans and Chapters, Archdeacons, and all other Ecclesiasticall Officers depending on that Hierarchy) Superstition, Heresie, Schisme, Profanenesse, and whatsoever shall be found to be contrary to sound Doctrine, and the power of Godlinesse; lest we partake in other mens sinnes, and thereby be in danger to receive of their plagues, and that the Lord may be one, and his Name one in the three Kingdomes.