John Gill Commentary Esther 4:13

"Then Mordecai bade them return answer unto Esther, Think not with thyself that thou shalt escape in the king`s house, more than all the Jews." — Esther 4:13 (ASV)

Then Mordecai commanded to answer Esther
Gave in charge to the messengers what they should say to Esther from him, by way of reply:

think not with yourself that you will escape in the king's house, more
than all the Jews ;
signifying that her being queen, and in the king's palace, would be no protection to her; and she would be no safer there than the Jews elsewhere, since they had no greater enemies any where than in the king's court; and it was or would be known of what nation she was, and therefore must not expect to escape the fury of the enemy.