Numbers 1:52-54

52 The rest of Isra’el are to set up camp, company by company, each man with his own banner.

53 But the L’vi’im are to camp around the tabernacle of the testimony, so that no anger will come upon the assembly of the people of Isra’el. The L’vi’im are to be in charge of the tabernacle of the testimony.”

54 This is what the people of Isra’el did — they did everything that ADONAI had ordered Moshe.