What does 2 Chronicles 28:9 mean?

But a prophet of the Lord named Oded was there. He went out to meet the army coming into Samaria and said, 'Look, because the Lord was angry with Judah, he let you defeat them. But you’ve gone too far, and now you’re planning to make these people your slaves. Aren’t you just as guilty before God as they are?' 2 Chronicles 28:9 - Modern Text Bible

(God sent a prophet to confront Israel about their cruelty and warn them not to take advantage of Judah’s defeat.)