Hosea is the first book of the twelve minor prophets. Because the times are outwardly prosperous, idolatry prevails and immorality is rampant. Hosea urges a return to God in order that He may show mercy and forgiveness.

Hosea 4

4:10 For they shall eat, and not have enough: they shall commit whoredom, and shall not increase: because they have left off to take heed to the LORD.