the LORD hath spoken evil
Its not evil. Its calamity of disaster.
2 reasons:
1. "
That which fills the heart proceeds out of the mouth". If God spoke evil, then there would be evil in His heart. Good luck defending that.
2. God commands us to
not speak evil toward anyone. His commandments are a reflection of His character. He wouldn't tell us to do something if it wasn't something He would do.
That being said....we know that רָעָה (rā·ʿā(h)
cannot be translated "evil" because it would contradict Scripture.
Even if God
did in some sort of way "speak evil"....it would only be Him declaring what they brought upon themselves, not God's doing.