23 Now the Gersonites are to encamp behind the tabernacle, towards the west,
Numbers 3:23 Cross References - Thomson
Numbers 1:53
53 let the Levites encamp before them, around the tabernacle of the testimony, that there may be no lapse committed by the children of Israel; and that the Levites themselves may guard the tabernacle of the testimony.
Numbers 2:17
17 Then shall move the tabernacle of the testimony, and the camp of the Levites, as the centre division of the camps. As they encamp so they shall take up their march, every man in his rank, according to their companies.