Charles Ellicott Commentary 1 Kings 15:26

"And he did that which was evil in the sight of Jehovah, and walked in the way of his father, and in his sin wherewith he made Israel to sin." — 1 Kings 15:26 (ASV)

Did evil in the sight of the Lord. —This constantly-recurring phrase signifies (as, indeed, the context here shows) perseverance in the idolatrous system introduced by Jeroboam.