The First Amendment

"Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances."

That is the entire First Amendment. The underlined portion contains two phrases called the religion clauses. The first of the two is called the “establishment clause,” and the second is called the “free exercise” clause.