2 Chronicles 13:7

And there are gathered unto him vain men,.... Void of the fear of God, and all that is good:

the children of Belial: men unprofitable, good for nothing, or that had cast off the yoke of the law of God, were lawless and abandoned persons:

And have strengthened themselves against Rehoboam the son of Solomon: rejected his government of them; went into a strong opposition to him, and set up another king over them:

when Rehoboam was young and tender hearted, and could not withstand them; not that he was young in years, for he was forty one years of age when he began to reign; though Joshua is called a young man when he is supposed to be between fifty and sixty years of age

Exodus 33:11, and though "adolescentia" and "juventus" are both used in Latin writers for "youth", yet Varro q distinguishes them, and makes the former to begin at the year fifteen, and continue to the year thirty, and the latter to begin at thirty, and end at forty five; so that, according to this, Rehoboam was then in his stage of youth; but perhaps the meaning here is, that he was young in the kingdom, scarcely settled on his throne, and the advantage of that was taken; not was he cowardly and fearful; and if Abijah meant that by "tender heartedness", he not only reproached but belied his father; for he would have fought with Israel in order to have reduced them to obedience, but was forbidden by the Lord; if by "tender hearted", he means that he had a tender regard to the command of God, it is true; but that seems not to be his sense, but the former.

q Apud Stockim in voce נער, p. 688.