Flavius Josephus, Antiquities of the Jews
William Whiston, A.M., Ed.

[236] Now Rehoboam, the son of Solomon, who, as we said before, was king of the two tribes, built strong and large cities, Bethlehem, and Etare, and Tekoa, and Bethzur, and Shoco, and Adullam, and Ipan, and Maresha, and Ziph, and Adorlam, and Lachlsh, and Azekah, and Zorah, and Aijalon, and Hebron; these he built first of all in the tribe of Judah. He also built other large cities in the tribe of Benjamin, and walled them about, and put garrisons in them all, and captains, and a great deal of corn, and wine, and oil, and he furnished every one of them plentifully with other provisions that were necessary for sustenance; moreover, he put therein shields and spears for many ten thousand men. The priests also that were in all Israel, and the Levites, and if there were any of the multitude that were good and righteous men, they gathered themselves together to him, having left their own cities, that they might worship God in Jerusalem; for they were not willing to be forced to worship the heifers which Jeroboam had made; and they augmented the kingdom of Rehoboam for three years. And after he had married a woman of his own kindred, and had by her three children born to him, he married also another of his own kindred, who was daughter of Absalom by Tamar, whose name was Maachah, and by her he had a son, whom he named Abijah. He had moreover many other children by other wives, but he loved Maachah above them all. Now he had eighteen legitimate wives, and thirty concubines; and he had born to him twenty-eight sons and threescore daughters; but he appointed Abijah, whom he had by Maachah, to be his successor in the kingdom, and intrusted him already with the treasures and the strongest cities.