תלמוד על אסתר 8:17

Anyone who becomes a proselyte for the sake of [marrying a Jewish] woman, or out of fear, or love¹⁵[Of the Jews, perhaps deriving material advantage from his conversion.] is not a proselyte. Similarly R. Judah and R. Nehemiah said: All [the Gentiles] who were converted in the days of Mordecai and Esther were not genuine proselytes, as it is stated, And many from among the peoples of the land became Jews; for the fear of the Jews was fallen upon them.¹⁶Esth. 8, 17. Anyone who is not converted from purely religious motives¹⁷lit. ‘to the name of Heaven’. is not a proselyte. [60b]