TSK · Numbers 3:38

But the Levites shall pitch round about the tabernacle of testimony, that there be no wrath upon the congregation of the children of Israel: and the Levites shall keep the charge of the tabernacle of testimony.

And they shall keep his charge, and the charge of the whole congregation before the tabernacle of the congregation, to do the service of the tabernacle.

The families of the Gershonites shall pitch behind the tabernacle westward.

And the chief of the house of the father of the families of Merari [was] Zuriel the son of Abihail: [these] shall pitch on the side of the tabernacle northward.

Their brethren also the Levites [were] appointed unto all manner of service of the tabernacle of the house of God.