Esther 6:1-2

That same night, the king could not sleep. So he told a servant to bring the history book and read it to him. ( The Book of History of the Kings lists everything that happens during a king’s rule.) The servant read the book to the king. He read about the evil plan to kill King Xerxes. That was when Mordecai had learned about Bigthana and Teresh. These two men were the king’s officers who guarded the doorway. They had planned to kill the king, but Mordecai learned about the plan and told someone about it.