1 Kings 9:25 - Joseph Benson’s Commentary on the Old and New Testaments

Three times in a year did Solomon offer burnt offerings That is, at least three times, namely, at the three solemn feasts which God had commanded to be observed by till the people. Then he offered sacrifices suitable to those great mercies which were at these seasons commemorated, and to the great blessings which God had bestowed on his family. But undoubtedly he also offered at all other appointed times. And he burned incense upon the altar In the holy place, before the ark. The meaning is not that he burned it himself, but only that he gave it to the priests at his own charge, to be offered with a particular respect to him. This he probably did every morning and evening. So he finished the house This, though said before, is now repeated, because, after he had kept the three great festivals there, the temple was not only consecrated, but all divine offices had been performed in it, and nothing more was to be added.