Numbers 1:49

1:49 “Only the tribe of Levi you must not number or count with the other Israelites.

Numbers 2:33

2:33 But the Levites were not numbered among the other Israelites, as the Lord commanded Moses.

Numbers 10:21

10:21 And the Kohathites set out, carrying the articles for the sanctuary; the tabernacle was to be set up before they arrived.