Numbers 10:17-21

Then the tabernacle was taken down; and the sons of Gershon and the sons of Merari, who were carrying the tabernacle, set out.

Next the flag of the camp of Reuben, by their armies, set out with Elizur the son of Shedeur, over its army,

and Shelumiel the son of Zurishaddai over the tribal army of the sons of Simeon,

and Eliasaph the son of Deuel was over the tribal army of the sons of Gad.

Then the Kohathites set out, carrying the holy objects; and the tabernacle was set up before their arrival.