What does Numbers 24:13 mean?

Even if Balak gave me his whole house filled with silver and gold, I couldn't go against what the Lord tells me to say, whether it's good or bad. I can only speak what God puts in my mouth. Numbers 24:13 - Modern Text Bible

(Balaam is making it clear that no amount of reward or pressure can make him say anything except what God commands. He's not for sale, and he can't change God's message.)