15 The children of the Levites bore the ark of God on their shoulders with the poles thereon, as Moses commanded according to the word of Yahweh.
*Minor differences ignored. Grouped by changes, with first version listed as example.
Upon their shoulders - That is the staves which went through the rings rested on their shoulders, but the ark itself rested on the staves like a sedan on its poles.
As Moses commanded - See Numbers 4:5, Numbers 4:15.
And the children of the Levites bare the ark of God upon their shoulders, with the staves thereon, as Moses commanded, according to the word of the Lord. Not only bare it on their shoulders, but with the staves in it, which rested on their shoulders, see Numbers 7:9, the reason of this command, that the ark should be carried on men's shoulders, and not in any carriage, according to Maimonides (h), was both for the honour of it, and lest its form and structure should be any ways damaged.
(h) Moreh Nevochim, par. 3. c. 45. p. 479.
*More commentary available at chapter level.