an angel spake.. solemn warning for all who listen to any revelation outside Scripture which purports to come from God, even though an "old prophet" asserts it. Compare Galatians 1:1; Galatians 1:8; Galatians 1:9. Of all such it may be said "he lied unto him".
Related Commentaries of 1 Kings 13:18
1 Kings 13:18
18 He said unto him, I am a prophet also as thou art; and an angel spake unto me by the word of the LORD, saying, Bring him back with thee into thine house, that he may eat bread and drink water. But he lied unto him.