I want to know the answer to the following question:
Who used William's phrase as a description of the First Amendment and its restriction on the legislative branch?
All the background I'm provided with is that "The phrase was later used by Thomas Jefferson as a description of the First Amendment and its restriction on the legislative branch of the federal government, in an 1802 letter to the Danbury Baptists (a religious minority concerned about the dominant position of the Congregationalist church in Connecticut):". Is that enough to answer the question?
Answer: yes