23 The families of the Gershonites shall pitch behind the tabernacle westward.
Numbers 3:23 Cross References - Webster
Numbers 1:53
53 But the Levites shall pitch around the tabernacle of testimony; that there may be no wrath upon the congregation of the children of Israel: and the Levites shall keep the charge of the tabernacle of testimony.
Numbers 2:17
17 Then the tabernacle of the congregation shall move forward with the camp of the Levites, in the midst of the camp: as they encamp, so shall they move forward, every man in his place by their standards.