Daniel's calling as a prophet started after the last king of Judah was dethroned, and the people of Judah were marched into exile. Daniel served God under many foreign kings. God protected him and gave him visions about the future, and about the coming Messiah. Ezra and Nehemiah served God in leading God's people as they went back to their homeland. Obadiah prophesied to the Edomites. The Edomites and the Israelites had a centuries long feud. The were both descendents of Abraham. Obadiah reminded them they were brothers, and warned the Edomites not to persecute the Israelites.