Joel (Warrior living at the time of United Monarchy)

Joel was a prophet whose short book uses a locust plague that had devastated Judah as a picture of an even more terrible coming day of the Lord, calling the nation to repentance and fasting in response. His prophecy that God would pour out his Spirit on all people, sons and daughters, old and young, slave and free, is quoted directly by Peter in Acts to explain what was happening at Pentecost. Several minor figures elsewhere in the Old Testament also share the name.