Charles Ellicott Commentary 1 Kings 8:65

"So Solomon held the feast at that time, and all Israel with him, a great assembly, from the entrance of Hamath unto the brook of Egypt, before Jehovah our God, seven days and seven days, even fourteen days." — 1 Kings 8:65 (ASV)

The entrance of Hamath is the significant name given to the great valley between Lebanon and Anti-Lebanon, which the Greeks called Coele-Syria; for it was the main entrance to Palestine from the north, down which the hosts of Assyria and Babylon so constantly poured. Evidently, it extended at this time beyond Damascus.

The river of Egypt is not, as one might naturally think, the Nile or any of its branches. For the word used signifies a "brook" or "torrent" instead. And this torrent, described in Numbers 34:5 and Joshua 15:4 as the border of Israel, is identified by all authorities with the torrent falling into the sea at El-Arish.