Joseph urges women to follow Masonry in keeping a secret in a letter to Emma Smith.
Joseph Smith, Letter to Emma Smith/Relief Society, March 31, 1842, The Joseph Smith Papers website, accessed May 6, 2021
We have been informed that some unprincipled men whose names we will not mention at present have been guilty of such crimes: we do not mention their names, not knowing but what there may be some among you who are not sufficiently skilled in Masonry as to keep a secret.