Now Rehoboam the son of Solomon reigned in Judah. Rehoboam was 41 years old when he began to reign, and he reigned 17 years in Jerusalem, the city that Yahweh had chosen out of all the tribes of Israel to put his name there; and his mother’s name was Naamah the Ammonite. Bible other translations

“Now Rehoboam.” The text shifts from following the northern kingdom of Israel to the southern kingdom of Judah.

“Rehoboam was 41 years old when he began to reign.” The fact that Rehoboam was 41 when he became king the year Solomon died, and Solomon had reigned 40 years, means that Rehoboam was born before David died and Solomon became king. So Solomon already had at least one wife, Naamah, who was an Ammonite, before he married Pharaoh’s daughter (1 Kings 3:1).

Commentary for: 1 Kings 14:21