Cross reference
Numbers 1:49
49 "Only the tribe of Levi you shall not number, neither shall you take a census of them among the children of Israel;
Numbers 26:62
62 Those who were numbered of them were twenty-three thousand, every male from a month old and upward: for they were not numbered among the children of Israel, because there was no inheritance given them among the children of Israel.
Numbers 2:33
33 But the Levites were not numbered among the children of Israel; as Yahweh commanded Moses.