Numbers 2:33-34

Young's Literal Translation

³³ And the Levites have not numbered themselves in the midst of the sons of Israel, as Jehovah hath commanded Moses.

³⁴ And the sons of Israel do according to all that Jehovah hath commanded Moses; so they have encamped by their standards, and so they have journeyed; each by his families, by the house of his fathers.