A Commentary, Critical, Practical, and Explanatory on the Old and New Testaments, by Robert Jamieson, A.R. Fausset and David Brown  at sacred-texts.com
3 Kings (1 Kings) 13:1
kg1 13:1JEROBOAM'S HAND WITHERS. (1Ki. 13:1-22)
there came a man of God out of Judah--Who this prophet was cannot be ascertained, He came by divine authority. It could not be either Iddo or Ahijah, for both were alive after the events here related.
Jeroboam stood by the altar to burn incense--It was at one of the annual festivals. The king, to give interest to the new ritual, was himself the officiating priest. The altar and its accompaniments would, of course, exhibit all the splendor of a new and gorgeously decorated temple. But the prophet foretold its utter destruction [Kg1 13:3].
3 Kings (1 Kings) 13:2
kg1 13:2he cried against the altar--which is put for the whole system of worship organized in Israel.
Behold, a child shall be born . . . Josiah by name--This is one of the most remarkable prophecies recorded in the Scriptures; and, in its clearness, circumstantial minuteness, and exact prediction of an event that took place three hundred sixty years later, it stands in striking contrast to the obscure and ambiguous oracles of the heathen. Being publicly uttered, it must have been well known to the people; and every Jew who lived at the accomplishment of the event must have been convinced of the truth of a religion connected with such a prophecy as this. A present sign was given of the remote event predicted, in a visible fissure being miraculously made on the altar. Incensed at the man's license of speech, Jeroboam stretched out his hand and ordered his attendants to seize the bold intruder. That moment the king's arm became stiff and motionless, and the altar split asunder, so that the fire and ashes fell on the floor. Overawed by the effects of his impiety, Jeroboam besought the prophet's prayer. His request was acceded to, and the hand was restored to its healthy state. Jeroboam was artful, and invited the prophet to the royal table, not to do him honor or show his gratitude for the restoration of his hand, but to win, by his courtesy and liberal hospitality, a person whom he could not crush by his power. But the prophet informed him of a divine injunction expressly prohibiting him from all social intercourse with any in the place, as well as from returning the same way. The prohibition not to eat or drink in Beth-el was because all the people had become apostates from the true religion, and the reason he was not allowed to return the same way was lest he should be recognized by any whom he had seen in going.
3 Kings (1 Kings) 13:11
kg1 13:11Now there dwelt an old prophet in Beth-el--If this were a true prophet, he was a bad man.
3 Kings (1 Kings) 13:18
kg1 13:18an angel spake unto me by the word of the Lord--This circuitous mode of speaking, instead of simply saying, "the LORD spake to me," was adopted to hide an equivocation, to conceal a double meaning--an inferior sense given to the word "angel"--to offer a seemingly superior authority to persuade the prophet, while really the authority was secretly known to the speaker to be inferior. The "angel," that is, "messenger," was his own sons, who were worshippers, perhaps priests, at Beth-el. As this man was governed by self-interest, and wished to curry favor with the king (whose purpose to adhere to his religious polity, he feared, might be shaken by the portents that had occurred), his hastening after the prophet of Judah, the deception he practised, and the urgent invitation by which, on the ground of a falsehood, he prevailed on the too facile man of God to accompany him back to his house in Beth-el, were to create an impression in the king's mind that he was an impostor, who acted in opposition to his own statement.
3 Kings (1 Kings) 13:21
kg1 13:21he cried unto the man of God that came from Judah--rather, "it cried," that is, the word of the Lord.
3 Kings (1 Kings) 13:24
kg1 13:24THE DISOBEDIENT PROPHET SLAIN BY A LION. (Kg1 13:23-32)
a lion met him by the way, and slew him--There was a wood near Beth-el infested with lions (Kg2 2:24). This sad catastrophe was a severe but necessary judgment of God, to attest the truth of the message with which the prophet had been charged. All the circumstances of this tragic occurrence (the undevoured carcass, the untouched ass, the passengers unmolested by the lion, though standing there) were calculated to produce an irresistible impression that the hand of God was in it.
3 Kings (1 Kings) 13:31
kg1 13:31bury me in the sepulchre wherein the man of God is buried--His motive in making this request was either that his remains might not be disturbed when the predicted events took place (see Kg2 23:18), or he had some superstitious hope of being benefited at the resurrection by being in the same cave with a man of God.