Reference for Numbers 2:33

וְהַ֨לְוִיִּ֔ם לֹ֣א הָתְפָּקְד֔וּ בְּת֖וֹךְ בְּנֵ֣י יִשְׂרָאֵ֑ל כַּאֲשֶׁ֛ר צִוָּ֥ה יְהוָ֖ה אֶת־מֹשֶֽׁה׃

But the Levites were not numbered among the children of Israel; as the LORD commanded Moses.

BDB

BDB