Esther 3:9

3:9 If the king is so inclined, let an edict be issued to destroy them. I will pay ten thousand talents of silver to be conveyed to the king’s treasuries for the officials who carry out this business.”

Esther 4:16

4:16 “Go, assemble all the Jews who are found in Susa and fast in my behalf. Don’t eat and don’t drink for three days, night or day. My female attendants and I will also fast in the same way. Afterward I will go to the king, even though it violates the law. If I perish, I perish!”

Esther 9:27

9:27 Therefore, because of the account found in this letter and what they had faced in this regard and what had happened to them, the Jews established as binding on themselves, their descendants, and all who joined their company that they should observe these two days without fail, just as written and at the appropriate time on an annual basis.