1 Kings 3:2-4

Revised Standard Version

² The people were sacrificing at the high places, however, because no house had yet been built for the name of the Lord.

³ Solomon loved the Lord, walking in the statutes of David his father; only, he sacrificed and burnt incense at the high places. ⁴ And the king went to Gibeon to sacrifice there, for that was the great high place; Solomon used to offer a thousand burnt offerings upon that altar.