Esther 9:31
in order to confirm these days of Purim in their set times, according as Mordecai the Jew and Esther the queen had ordered them, and as they had decreed for themselves and for their seed the matters of the fastings and of their cry.
Esther 4:3
And in every province, wherever the king's command and his decree came, there was great mourning among the Jews, and fasting, and weeping and wailing. And many lay in sackcloth and ashes.
Esther 4:16
Go, gather all the Jews who are present in Shushan, and fast for me, and do not eat nor drink three days, night or day. My maidservants and I will also fast in the same way. And so I will go in to the king, which is not according to the law. And if I perish, I perish.
Jonah 3:2-9
Arise, go to Nineveh, that great city, and cry out to it the proclamation that I am declaring to you.