1 Kings 8:21 (ESV)

21 And there I have provided a place for the ark, in which is the covenant of the LORD that he made with our fathers, when he brought them out of the land of Egypt.”

The last verse of Solomon’s address to the people mentions a specific matter that the building of the temple had accomplished. It provided a place for the ark of the covenant. Solomon reminded his hearers that the ark is a witness to God’s faithfulness in the past in bringing the people out of Egypt.