NUM 3:38

38 Aaron and Moses/I and Aaron’s sons were told to set up their/our tents in the area in front of the Sacred Tent, on the east side. Their/Our work was to supervise the work that would be done in and around the Sacred Tent, for the benefit of the Israeli people. Only the priests were permitted to do that. [Yahweh declared that] we should execute anyone else who went near the tent [to do the work that the priests do].