וַיַּ֣עַשׂ שְׁלֹמֹ֣ה אֶת־הֶ֠חָג בָּעֵ֨ת הַהִ֜יא שִׁבְעַ֤ת יָמִים֙ וְכָל־יִשְׂרָאֵ֣ל עִמּ֔וֹ קָהָ֖ל גָּד֣וֹל מְאֹ֑ד מִלְּב֥וֹא חֲמָ֖ת עַד־נַ֥חַל מִצְרָֽיִם׃
So Solomon held the feast at that time seven days, and all Israel with him, a very great congregation, from the entrance of Hamath unto the Brook of Egypt.
Read midrashic interpretation of II Chronicles 7:8: and classical rabbinic exegesis.