For the legislation against the Jews, see Amnon Linder, The Jews in Roman Imperial Legislation (Detroit: Wayne State, 1987). The laws frequently prohibit the Jewish ownership and conversion of non-Jewish slaves, but otherwise say nothing about the seeking of proselytes. For prohibitions of Manichees (and others) from seeking converts, see Mosaicarum et Romanarum Legum Collatio 15.3.4 (302 C.E.?) and Theodosian Code 16.5.11 (383 C.E.).