The Judean prophet had clear instructions from the Lord to maintain his fast and return a different way home, but he was deceived by an old prophet’s claim that the Lord had said he could stay and eat with him. He had resisted King Jeroboam’s invitation, but he fell prey to the old prophet’s lie. And while returning to Judah, he was killed by a lion along the way.
This is one of the stranger episodes in the Bible, yet a clear principle might be seen. Obey the Word of the Lord even when a another believer tells you that he has had a fresh revelation on the matter. Especially, when the so-called new word from the Lord makes it easier to give in to your fleshly appetite. Better to fast and live, than to eat and die.