And also unto the Levites; they shall no more carry ... — Rather, And the Levites also have not (now) to carry the dwelling and all its vessels for its service, as they had to do in the wanderings of Israel in the desert. The sacred dwelling-place (mishkân) had long been fixed at Gibeon; and the service of the Levites was so much the lighter, as in the olden time they not only had to carry about from place to place, but also to guard the holy tent and its belongings against the attacks of marauders. The inference is that as the duties had become so much less arduous, they might well be undertaken at an earlier age than the ancient custom permitted.
They shall no more carry. — Comp. the same infinitival construction in 2 Chronicles 5:11.