Peter receives revelation saying to reveal gospel to Gentiles.
Acts 10:13-15, 28 (King James Version, 2013 LDS edition)
13 And there came a voice to him, Rise, Peter; kill, and eat. 14 But Peter said, Not so, Lord; for I have never eaten any thing that is common or unclean. 15 And the voice spake unto him again the second time, What God hath cleansed, that call not thou common. . . . 28 And he said unto them, Ye know how that it is an unlawful thing for a man that is a Jew to keep company, or come unto one of another nation; but God hath shewed me that I should not call any man common or unclean.