Esther’s response was reported to Mordecai.
Mordecai told the messenger to reply to Esther, “Don’t think that you will escape the fate of all the Jews because you are in the king’s palace. If you keep silent at this time, relief and deliverance will come to the Jewish people from another place, but you and your father’s family will be destroyed. Who knows, perhaps you have come to your royal position for such a time as this.”
Esther sent this reply to Mordecai: “Go and assemble all the Jews who can be found in Susa and fast for me. Don’t eat or drink for three days, night or day. I and my female servants will also fast in the same way. After that, I will go to the king even if it is against the law. If I perish, I perish.” So Mordecai went and did everything Esther had commanded him.