Albert Barnes Commentary 1 Kings 14:28

"And it was so, that, as oft as the king went into the house of Jehovah, the guard bare them, and brought them back into the guard-chamber." — 1 Kings 14:28 (ASV)

It appears from this verse that even though Rehoboam encouraged and perhaps secretly practiced idolatry (1 Kings 14:22–24; compare to 1 Kings 15:3; 1 Kings 15:12; 2 Chronicles 12:1), he maintained a public profession of faith in Yahweh and attended the temple services in state. Compare this to the conduct of Solomon (1 Kings 9:25).