2 Chronicles 11:21

“And Rehoboam loved Maacah the daughter of Absalom above all his wives and his concubines, etc] Who is called Michaiah, the daughter of Uriel, (<141302>2 Chronicles 13:2), for he took eighteen wives and sixty concubines; led thereunto by the example of his father Solomon, contrary to the command of God, (<051717>Deuteronomy 17:17) and begat twenty eight sons and sixty daughters; to have many children was reckoned a great blessing, but it was not honourable to have them in such a way.”

“he took eighteen wives, and threescore concubines--This royal harem, though far smaller than his father's, was equally in violation of the law, which forbade a king to "multiply wives unto himself" [Deu 17:17].”

“eighteen wives: Ch2 11:23; Deu 17:17; Jdg 8:30; Sa2 3:2-5, Sa2 5:13; Kg1 11:3; Ch1 3:1-9; Sol 6:8, Sol 6:9 2 Chronicles 11:22”

“Only these wives with their children are mentioned by name, though besides these Rehoboam had a number of wives, 18 wives and 60 (according to Josephus, 30) concubines, who bore him twenty-eight sons and sixty daughters. Rehoboam trod in his father's footsteps in this not quite praise-worthy point. The eldest son of Maachah he made head (לראשׁ), i.e., prince, among his brethren; להמליכו כּי, for to make him king, scil. was his intention. The infin. with ל is here used in the swiftness of speech in loose connection to state with what further purpose he had appointed him נגיד; cf. Ew. 351, c, at the end. 2 Chronicles 11:23”