Kings III 3:4

4 And he arose and went to Gabaon to sacrifice there, for that the highest place, and great: Solomon offered a whole-burnt-offering of a thousand on the altar in Gabaon.

Kings III 3:4 In-Context

2 Nevertheless the people burnt incense on the high places, because a house had not yet been built to the Lord.
3 And Solomon loved the Lord, to walk in the ordinances of David his father; only he sacrificed and burnt incense on the high places.
4 And he arose and went to Gabaon to sacrifice there, for that the highest place, and great: Solomon offered a whole-burnt-offering of a thousand on the altar in Gabaon.
5 And the Lord appeared to Solomon in a dream by night, and the Lord said to Solomon, Ask some petition for thyself.
6 And Solomon said, Thou hast dealt very mercifully with thy servant David my father according as he walked before thee in truth, and in righteousness, and in uprightness of heart with thee, and thou hast kept for him this great mercy, to set his son upon his throne, as this day.

The Brenton translation of the Septuagint is in the public domain.