We skip ahead in our story, but you'll notice that today's passage follows up on the events we've been reading about. We read how much injustice Ahab and Jezebel encouraged as King and Queen of Israel. We also saw how the Prophet Elijah opposed them. God told Elijah to anoint Elisha as his successor and told him he would also anoint Jehu as King of Israel. In today's reading Elijah has gone to heaven and Elisha has taken over his ministry. Elisha sends a younger prophet on a stealth mission to anoint Jehu as King of Israel.
Like when Samuel anointed David, there's great danger in anointing the next king while the current king is still ruling. In this case, part of the reason for anointing Jehu is to bring God's punishment on Ahab and his family. The best example of how Ahab and Jezebel earned God's anger is the story of Naboth's vineyard in 1 Kings 21, in which they take a vineyard from an innocent man by having him killed. The story continues in the passage below.