In 2 Chronicles 5:4, ““the Levites” took up the ark;” and by the Law the ark was the special charge of the Kohathites Numbers 3:31; Numbers 4:15. But all priests were Levites Joshua 3:3, though all Levites were not priests. And as Joshua had done Joshua 3:6; Joshua 6:6, so Solomon called upon the priests to bear the holy structure, allowing to mere Levites only the inferior honor of helping to transport the tabernacle and the vessels of the sanctuary.
Related Commentaries of 1 Kings 8:3
1 Kings 8:3
3 And all the elders of Israel came, and the priests took up the ark.