And it came to pass, when Rehoboam had established the kingdom, and had strengthened himself, he forsook the law of the LORD, and {a} all Israel with him.

(a) For such is the inconstancy of the people, that for the most part they follow the vices of their governors.

Wesley's Notes

12:1 And all Israel - So called, because they forsook God, as Israel had done.

Jamieson-Fausset-Brown Bible Commentary

CHAPTER 12

2Ch 12:1-12. Rehoboam, Forsaking God, Is Punished by Shishak.

1. when Rehoboam had established the kingdom, and had strengthened himself-(See on [433]2Ch 11:17). During the first three years of his reign his royal influence was exerted in the encouragement of the true religion. Security and ease led to religious decline, which, in the fourth year, ended in open apostasy. The example of the court was speedily followed by his subjects, for "all Israel was with him," that is, the people in his own kingdom. The very next year, the fifth of his reign, punishment was inflicted by the invasion of Shishak.

Matthew Henry's Concise Commentary

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.