Adam Clarke on 2 Chronicles 7:10

On the three and twentieth day - This was the ninth day of the dedication of the temple; but in 1Kgs 8:66 it is called the eighth day. "The meaning is this," says Jarchi: "he gave them liberty to return on the eighth day, and many of them did then return: and he dismissed the remainder on the ninth, what is called here the twenty-third, reckoning the fourteen days for the duration of the two feasts; in all, twenty-three."

The Targum paraphrases this verse thus: "The people departed with a glad heart, for all the good which God had done to David his servant, on whose account the doors of the sanctuary were open and for Solomon his son, because God had heard his prayer, and the majesty of the Lord had rested on the house of the sanctuary and for Israel, his people, because God had favourably accepted their oblations, and the heavenly fire had descended, and, burning on the altar, had devoured their sacrifices."