Jesus Christ, whom he hath sent. I am he. Receive ye, therefore, my law.
Source, in full
Jesus Christ, speaking through Joseph Smith's 12 July 1843 polygamy revelation on plural marriage and His demand that Emma Smith, the first wife, accept all of Joseph Smith's plural wives; Doctrine and Covenants, 132:1–4, 19, 20, 24, 34, 35, 38, 39, 52, 60–66.