Fasting like Ezra the priest
Ezra was a priest and post-exilic leader of the people of God. He was a major player in the restoration of the temple and God-ordained worship. Later in his ministry the following occurred:
Ezr 9:1 When these things were done, the leaders came to me, saying, “The people of Israel and the priests and the Levites have not separated themselves from the peoples of the lands, with respect to the abominations of the Canaanites, the Hittites, the Perizzites, the Jebusites, the Ammonites, the Moabites, the Egyptians, and the Amorites.