Minutes of a Council of Fifty Meeting mention a decision to ask Saints to not meet in prayer meetings.
Council of Fifty, Minutes, March 1844–January 1846; Volume 3, 6 May 1845–13 January 1846, josephsmithpapers.org
He [Brigham Young] also wants an influence to go from this council to have the saints quit making robes, and meeting to pray in their garments.