1 Kings 14:21

And Rehoboam the son of Solomon reigned in Judah
Over the two tribes of Judah and Benjamin, when Jeroboam reigned over the other ten:

Rehoboam [was] forty one years old when he began to reign;
being born one year before his father Solomon began to reign, and so it might have been expected he would have begun his reign more wisely than he did:

and he reigned seventeen years in Jerusalem;
not half so long as his father and grandfather, being neither so wise nor so good a prince as either of them:

the city which the Lord did choose out of all the tribes of Israel, to
put his name there;
to have a temple built for him, and his worship carried on in it; which was an aggravation of the sin of Rehoboam, that he should reign in such a place, and yet be guilty of the crimes he was; the three first years he reigned well, but afterwards forsook the law of the Lord, ( 2 Chronicles 11:17 ) ( 12:1 )

and his mother's name was Naamah an Ammonitess;
and which is observed again, ( 1 Kings 14:31 ) , she being the instrument of drawing him into idolatry, which it is very probable she practised in the days of Solomon, ( 1 Kings 11:5 1 Kings 11:7 ) .