<human>:  Where does the right to free speech come from?
<bot>: The right to free speech is enshrined in the First Amendment of the United States Constitution. It states that "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."