So at that time Solomon and all Israel with him—a very great assembly of people from Lebo-hamath to the Brook of Egypt—kept the feast for seven days.
Here is, I. The gracious answer which God immediately made to Solomon's prayer: The fire came down from heaven and consumed the sacrifice, Ch2 7:1. In this way God testified his acceptance of Moses (Lev 9:24), of Gideon (Jdg 6:21), of David (Ch1 21:26), of Elijah (Kg1 18:38); and, in general, to accept the burnt-sacrifice is, in the Hebrew phrase, to turn it to ashes, Psa 20:3.
Commenting on 2 Chronicles 7:1-11
Solomon kept the feast seven days--The time chosen for the dedication of the temple was immediately previous to the feast of tabernacles (see on Kg1 8:1-12). That season, which came after the harvest, corresponding to our September and October, lasted seven days, and during so prolonged a festival there was time afforded for the offering of the immense sacrifices enumerated.
Also at the same time Solomon kept the feast seven days, and all Israel with him, a very great congregation, from the entering in of Hamath unto the river of Egypt. (b) The feast of the tabernacles which was kept in the seventh month.