One hundred years after exile, the Israelites who had returned to Jerusalem were as evil and corrupt as their ancestors. The book of Malachi addresses their corruption regarding issues like sacrifices, marriage and tithing. It also affirms that God does love His people and will fulfill prophecy.
Malachi
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Old Testament: Part 4
Hosea
The Northern Kingdom of Israel enjoyed moderate success from conquering neighboring kingdoms, but they were spiritually bankrupt on the inside. In the Book of Hosea, God sends Hosea to Israel during King Jeroboam II's reign to admonish them of their wrongs in perpetual idol worship and dependence on outside nations.