From Megilas Esther, Chapter 4:
Mordechai told him (Hasach) of all that had happened to him, and all about the sum of money that Haman had promised to pay to the royal treasuries for the annihilation of the Jews. He also gave him a copy of the text of the decree which was distributed in Shushan for their destruction – so that he might show it to Esther and inform her, bidding her to go to the King, to appeal to him, and to plead with him for her people.
Hasach came and told Esther what Mordchai had said.
Then Esther told Hasach to return to Mordechai with this message:
“All the King’s servants and the people of the King’s provinces are well aware that if anyone, man or woman, approaches the King in the inner court without being summoned, there is but one law for him – that he be put to death – except for the person to whom the King shall extend the gold scepter, so that he may live. Now I have not been summoned to come to the King for the past 30 days.”
They related Esther’s words to Mordechai.
Then Mordechai said to reply to Esther:
“Do not imagine that you will be able to escape in the King’s palace any more than the rest of the Jews. For if you persist in keeping silent at a time like this, relief and deliverance will come to the Jews from some other place, while you and your father’s house will perish. And who knows whether it was just for such a time as this that you attained the royal position!”
Mordechai who?