Esther 4:15-17

Then Esther told them to reply to Mordecai, “Go, gather all the Jews that are present in Susa, and observe a fast for me; do not eat or drink for three days, night or day. I and my maids also will fast in the same way. Then I will go in to [see] the king [without being summoned], which is against the law; and if I perish, I perish.” So Mordecai went away and did exactly as Esther had commanded him.