John Wesley on Numbers 22:8

This night - The night was the time when God used to reveal his mind by dreams. The Lord - Heb. Jehovah, the true God, whom he here mentions, either for his own greater reputation, as if he consulted not with inferior spirits, but with the supreme God; or rather because this was Israel's God, and the only possible way of ruining them was by engaging their God against them: as the Romans and other Heathens, when they went to besiege any city, used enchantments to call forth that God under whose peculiar protection they were. Of Moab - And of Midian too.