Esther spoke to Hathach and commanded him to say to Mordecai,
"All the king's advisers and the people in the king's provinces know that no one approaches the king in the throne room without being summoned. By law that person must be put to death. Only if the king holds out the golden scepter to him will he live. I, myself, have not been summoned to enter the king's presence for 30 days now."
So Esther's servants told Mordecai what Esther said.
Mordecai sent this answer back to Esther, "Do not imagine that just because you are in the king's palace you will be any safer than all the rest of the Jews.
The fact is, even if you remain silent now, someone else will help and rescue the Jews, but you and your relatives will die. And who knows, you may have gained your royal position for a time like this."
Esther sent this reply back to Mordecai,
"Assemble all the Jews in Susa. Fast for me: Do not eat or drink at all for three entire days. My servants and I will also fast. After that, I will go to the king, even if it is against a royal decree. If I die, I die."
Mordecai did just as Esther had commanded him.