Answer :

The First Amendment gives us freedom of religion. Here's the text: 
"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."
It is stated in the first section ("Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof...")
Hope this helps!
The amendment that gave us freedom of religion was the First amendment.