Mishkat al-Masabih 14:69

Ibn ‘Abbas reported the Prophet as saying, “When a man calls another a Jew give him twenty lashes, when he calls someone a mukhannath * give him twenty lashes, and kill anyone who has intercourse with a woman who is within the prohibited degress.” Tirmidhi transmitted it, saying this is a gharib tradition. * Mukhannaths were sexually abnormal men who imitated women. Some of them were signets.