And Aaron shall offer the Levites before the Lord,.... Or "wave" them, as a wave offering, which was moved to and fro, backwards and forwards; not that they were actually so waved and moved to and fro by Aaron, which could not be done by him; though it is possible he might make such a motion himself, and they might do the like after him, thereby signifying that they belonged unto the Lord of the whole earth; and some think this testified their readiness to serve the Lord; to which may be added their constant employment in his service, being always in motion, doing one piece of service or another continually; as the people of God, and especially the ministers of the word, should be always abounding: in the work of the Lord.
Ainsworth supposes that the troubles and afflictions of the ministers of God are figured hereby:[for] an offering of the children of Israel; to the Lord, hereby devoting them to his service:that they may execute the service of the Lord; for them, in their room and stead, do what otherwise they must have done; see Nu 3:7; with this compare Isa 66:20.