1 Kings 8:64-65

64On that same day, the king consecrated the middle of the court that was before the House of Adonai, for there he offered the burnt offering and the grain offering and the fat of the fellowship offerings, because the bronze altar that was before Adonai was too small to accommodate the burnt offering, the grain offering and the fat of the fellowship offerings.

65So Solomon and all Israel with him celebrated the Festival at that time—a great congregation from the entrance of Hamath to the Wadi of Egypt—before Adonai Eloheinu, seven days and then seven more days—14 days in all.