Esther's Resolve and Call for Fasting

Esther 4:16-17

Go, and gather together all the Jews whom thou shalt find in Susan, and pray ye for me. Neither eat nor drink for three days and three nights: and I with my handmaids will fast in like manner, and then I will go in to the king, against the law, not being called, and expose myself to death and to danger.

So Mardochai went, and did all that Esther had commanded him.