1 Kings 8:65-66

65So at that time Solomon held the feast, and all Israel with him, a great assembly, from the entrance of Hamath [on the northern border of Israel] to the Brook of Egypt [at Israel’s southern border], before the Lord our God, for seven days and seven more days [beyond the prescribed period for the Feast of Booths], fourteen days in all.

66On the eighth (fifteenth) day he sent the people away and they blessed the king. Then they went to their tents joyful and in good spirits because of all the goodness which the Lord had shown to David His servant and Israel His people.