[Mary Elizabeth Rollins Lightner]
"He [Joseph Smith] preached polygamy and he not only preached it, but he practiced it. I am a living witness to it. It was given to him before he gave it to the Church. An angel came to him and the last time he came with a drawn sword in his hand and told Joseph if he did not go into that principle, he would slay him." Smith says an angel with a sword has visited him three times about polygamy . "Well," said I, "don't you think it was an angel of the devil that told you these things?" Said he, "No, it was an angel of God. God Almighty showed me the difference between an angel of light and Satan's angels. The angel came to me three times between the years of 1834 and 1842 and said I was to obey that principle or he would slay me. "But," said he, "they called me a false and fallen prophet but I am more in favor with my God this day than I ever was in all my life before. I know that I shall be saved in the Kingdom of God. I have the oath of God upon it and God cannot lie; all that he gives me I shall take with me for I have that authority and that power conferred upon me."
[Source: Testimony of Sister Mary Lightner, Address to Brigham Young University, April 14th, 1905, BYU Archives and Manuscripts, see also http://www.ldshistory.net/pc/merlbyu.htm, in Joseph Smith Polygamy Timeline, http://www.i4m.com/think/polygamy/JS_Polygamy_Timeline.htm]