And the Lord spake unto Moses,.... Though Aaron is not mentioned here, he was concerned in taking the sum of the Gershonites, as well as of the Kohathites, as appears from Numbers 4:41,
saying; as follows.

We have here the charge of the other two families of the Levites, which, though not so honourable as the first, yet was necessary, and to be done regularly. All the things were delivered them by name. It intimates the care God takes of his church and every member of it. The death of the saints is represented as the taking down of the tabernacle, 2-Corinthians 5:1, and the putting it off, 2-Peter 1:14. All shall be raised up in the great day, when these vile bodies shall be made like the glorious body of Jesus Christ, and so shall be for ever with the Lord.

The service of the Gershonites is introduced in Numbers 4:21-23 in the same manner as that of the Kohathites in Numbers 4:1-3; and in Numbers 4:24-26 it is described in accordance with the brief notice and explanation already given in Numbers 3:24-26.