To set up his son - The idolatry of Abijam deserved the same punishment as that of Jeroboam 1 Kings 14:10-14, of Baasha 1 Kings 16:2-4, or of Zimri 1 Kings 16:19, the cutting off of his seed, and the transfer of the crown to another family. That these consequences did not follow in the kingdom of Judah, was owing to the "faithfulness" of David (see the marginal reference), which brought a blessing on his posterity. Few things are more remarkable and more difficult to account for on mere grounds of human reason, than the stability of the succession in Judah, and its excessive instability in the sister kingdom. One family in Judah holds the throne from first to last, during a space but little short of four centuries, while in Israel there are nine changes of dynasty within two hundred and fifty years.

The Lord - give him a lamp - That is, a son to succeed him; see 1 Kings 11:36.

Nevertheless, for David's sake did the Lord his God give him a lamp in Jerusalem,.... A kingdom there, as the Targum, splendid and glorious, to be continued in his posterity: to set up his son after him; in it:

and to establish Jerusalem: to continue that in which the temple was, for the sake of which, and the worship of God in it, there was a succession of David's posterity on the throne of Judah.

Nevertheless for David's sake did the LORD his God give him a {b} lamp in Jerusalem, to set up his son after him, and to establish Jerusalem:

(b) Meaning, a son to reign over Judah.

15:4 A lamp - A son and successor to perpetuate his name and memory, which otherwise had gone into obscurity. Jerusalem - That he might maintain that city, and temple, and worship, as a witness for God, in the world, against the Israelites and heathen world.

lamp: or, candle

4. for David's sake did the Lord his God give him a lamp-"A lamp" in one's house is an Oriental phrase for continuance of family name and prosperity. Abijam was not rejected only in consequence of the divine promise to David (see on [314]1Ki 11:13-36).

15:1-8 Abijam's heart was not perfect with the Lord his God; he wanted sincerity; he began well, but he fell off, and walked in all the sins of his father, following his bad example, though he had seen the bad consequences of it. David's family was continued as a lamp in Jerusalem, to maintain the true worship of God there, when the light of Divine truth was extinguished in all other places. The Lord has still taken care of his cause, while those who ought to have been serviceable thereto have lived and perished in their sins. The Son of David will still continue a light to his church, to establish it in truth and righteousness to the end of time. There are two kinds of fulfilling the law, one legal, the other by the gospel. Legal is, when men do all things required in the law, and that by themselves. None ever thus fulfilled the law but Christ, and Adam before his fall. The gospel manner of fulfilling the law is, to believe in Christ who fulfilled the law for us, and to endeavour in the whole man to obey God in all his precepts. And this is accepted of God, as to all those that are in Christ. Thus David and others are said to fulfil the law.