John Gill Commentary 1 Kings 3:3

"And Solomon loved Jehovah, walking in the statutes of David his father: only he sacrificed and burnt incense in the high places." — 1 Kings 3:3 (ASV)

And Solomon loved the Lord
The worship of the Lord, as the Targum: and which he showed by

walking in the statutes of David his father ;
in which his father walked, which were the statutes of the Lord, or which he exhorted him to walk in, and were the same, (1 Kings 2:3) ;

only he sacrificed and burnt incense in high places ;
besides that at Gibeon, which it seems David did not.