Esther 2:10, 17, 20

Esther had not revealed her people or family, for Mordecai had charged her not to reveal it.

The king loved Esther more than all the other women, and she obtained grace and favor in his sight more than all the virgins; so he set the royal crown upon her head and made her queen instead of Vashti.

Now Esther had not revealed her family and her people, just as Mordecai had charged her, for Esther obeyed the command of Mordecai as when she was brought up by him.