Taught all Israel. It was the responsibility of the Levites to instruct the people in the law and in the things of God (Lev. 10:11; Deut. 33:8, 10; cf. Neh. 8:7; 2 Chron. 17:7-9).
Which were holy. These Levites had been separated and sanctified to the work of the Lord. “Holiness to the Lord” was the inscription on Aaron’s miter (Ex. 28:36).
Put the holy ark in the house. This command indicates that the ark had previously been removed from the Temple and was now to be restored to its proper place. There is no Biblical record as to when and by whom the ark may have been removed from its regular place in the Temple. One suggestion is that it was removed in order to make the Temple repairs.
Not be a burden. Compare Num. 7:9; 1 Chron. 15:2.