1 Kings 8:64-65

64On that same day the king consecrated the middle part of the courtyard in front of the temple of the Lord, and there he offered burnt offerings, grain offerings and the fat of the fellowship offerings, because the bronze altar that stood before the Lord was too small to hold the burnt offerings, the grain offerings and the fat of the fellowship offerings.

65So Solomon observed the festival at that time, and all Israel with him—a vast assembly, people from Lebo Hamath to the Wadi of Egypt. They celebrated it before the Lord our God for seven days and seven days more, fourteen days in all.