1 Kings 13:20 - Ellicott's Commentary On The Whole Bible

The word of the Lord came. — It is, perhaps, the most terrible feature in the history that the Divine sentence is spoken — no doubt, as in the case of Balaam, unwillingly — through the very lips which by falsehood had lured the prophet of Judah from the right path, and at the very table of treacherous hospitality. Josephus, with his perverse tendency to explain away all that seems startling, misses this point entirely, and assigns the revelation to the prophet of Judah himself. Striking as this incident is, it is perhaps a symbol of a general law constantly exemplifying itself, that the voice of worldly wisdom first beguiles the servants of God to disobedience by false glosses on their duty to Him, and then proclaims unsparingly their sin and its just punishment.