Hegai paid particular attention to what Esther ate. For her he brought dishes from the royal table, which, however, she refused obstinately to ouch. Only such things passed her lips as were permitted to Jews. She lived entirely on vegetable food, as Hananiah, Mishael, and Azariah had aforetimes done at the court of Nebuchadnezzar. The forbidden tidbits she passed over to the non-Jewish servants. Her personal attendants were seven Jewish maidens as consistently pious as herself, whose devotion to the ritual law Esther could depend upon.
How Esther Kept Kosher in the Persian Palace
Legends of the Jews 12:64