Overview
Reba was one of five Midianite kings who were enemies of Israel during the wilderness period and the conquest of Canaan. He is mentioned in connection with Balaam and represents the pagan opposition that God's people faced as they entered the Promised Land. His defeat demonstrates God's sovereignty in removing obstacles to His redemptive plan for Israel.
Key Scriptures
"And they killed the kings of Midian with the rest of their slain: Evi, Rekem, Zur, Hur, and Reba, the five kings of Midian" (Numbers 31:8, ESV).
"And all the cities of Sihon king of the Amorites, who reigned in Heshbon, as far as the border of the Ammonites; and Gilead, and the border of the Geshurites and Maacathites, and all Mount Hermon, and all Bashan to Salecah; all the kingdom of Og in Bashan, which reigned in Ashtaroth and in Edrei (he alone was left of the remnant of the Rephaim); for these did Moses the servant of the Lord and the sons of Israel defeat" (Joshua 13:21, ESV).
Application
Remember that God removes spiritual opposition from those who trust in Him and seek to follow His purposes.