Numbers 8:9

And thou shalt bring the Levites before the tabernacle of the congregation: and thou shalt gather the whole assembly of the children of Israel together:

Cross-references

Exodus 29:4-37 details the consecration of priests; this same ritual pattern is applied to the Levites here.

Exodus 40:12 describes bringing priests to the tabernacle door for washing — parallel to the Levites' gathering here.

Leviticus 8:3 commands gathering the assembly for Aaron's consecration — the same phrase used for Levites here.