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 2

2:21 And it shall come to pass in that day, I will hear, saith the LORD, I will hear the heavens, and they shall hear the earth;