1 Kings 3:2-4

Lexham English Bible

² But the people were sacrificing on the high places, for the house for the name of Yahweh had not yet been built in those days. ³ Solomon loved Yahweh, by walking in the statutes of David his father; only he was sacrificing and offering incense on the high places. ⁴ So the king went to Gibeon to sacrifice, for the great high place was there. Solomon used to offer a thousand burnt offerings on that altar.