(1) When Rehoboam had established the kingdom.--Rather, when Rehoboam's kingdom had been established. The construction is impersonal: when one had established Rehoboam's kingdom. The narrative is resumed from 2Chronicles 11:17.

And had strengthened himself.--And when he had become strong (hezq?h, an infinitive, used again at 2Chronicles 26:16; Daniel 11:2, and nowhere else).

He forsook the law of the Lord--i.e., lapsed into idolatry. (See 1Kings 14:22-24, where the offence is more precisely described.)

All Israel.--The southern kingdom being regarded as the true Israel. (Comp. 2Chronicles 12:6.)

Verse 1. - When Rehoboam had established the kingdom... strengthened himself; i.e. while insecure and full of apprehensions, Rehoboam walked humbly and surely, but when he thought his object, simply safety, was gained, his true and worse self appeared or reappeared, and, clothed with self-confidence, he forsakes the "Law," to bring sure retribution on himself. All Israel with him. When we turn to the fuller statements of the parallel (1 Kings 14:22-24), we see that the sins that were at work were not those of king merely, but of people, especially in abominations such as those of sodomy and the immoral practices of the "groves," as well as the ecclesiastical and irreligious iniquities of "high places" and "image" worship!

12:1-16 Rehoboam, forsaking the Lord, is punished. - When Rehoboam was so strong that he supposed he had nothing to fear from Jeroboam, he cast off his outward profession of godliness. It is very common, but very lamentable, that men, who in distress or danger, or near death, seem much engaged in seeking and serving God, throw aside all their religion when they have received a merciful deliverance. God quickly brought troubles upon Judah, to awaken the people to repentance, before their hearts were hardened. Thus it becomes us, when we are under the rebukes of Providence, to justify God, and to judge ourselves. If we have humbled hearts under humbling providences, the affliction has done its work; it shall be removed, or the property of it be altered. The more God's service is compared with other services, the more reasonable and easy it will appear. Are the laws of temperance thought hard? The effects of intemperance will be found much harder. The service of God is perfect liberty; the service of our lusts is complete slavery. Rehoboam was never rightly fixed in his religion. He never quite cast off God; yet he engaged not his heart to seek the Lord. See what his fault was; he did not serve the Lord, because he did not seek the Lord. He did not pray, as Solomon, for wisdom and grace; he did not consult the word of God, did not seek to that as his oracle, nor follow its directions. He made nothing of his religion, because he did not set his heart to it, nor ever came up to a steady resolution in it. He did evil, because he never was determined for good.And it came to pass, when Rehoboam had established the kingdom,.... Or when the kingdom of Rehoboam was established; the tribes of Judah and Benjamin being firmly attached to him, and great numbers from the other tribes coming over to him, and things going on peaceably and prosperously during the three years that he and his people abode by the pure worship of God:

and had strengthened himself; built fortified cities for the defence of himself and kingdom, 2 Chronicles 11:5, he forsook the law of the Lord; after he had reigned three years, and was become strong, and thought himself safe and secure on the throne, trusting to his strength:

and all Israel with him; the greater part of them following the example of their king; of this defection, and the sins they fell into, see 1 Kings 14:22.