Esther 4:15-17

Then Esther told them to reply to Mordecai: “Go, gather all the Jews who are present in Shushan, and fast for me; neither eat nor drink for three days, night or day. My maids and I will fast likewise. And so I will go to the king, which is against the law; and if I perish, I perish!” So Mordecai went his way and did according to all that Esther commanded him.