en_tn_lite_do_not_use/num/08/09.md

assemble the whole community

"gather the whole community"

before Yahweh

Here Yahweh refers to himself by his own name.

the people of Israel must lay their hands on the Levites

The action "laying on hands" on someone was often done to dedicate them to Yahweh's work or service. AT: "The people Israel must lay their hands on the Levites, dedicating them to me" (See: rc://en/ta/man/translate/translate-symaction)

as a wave offering

Aaron was to present the Levites to Yahweh with the same amount of dedication as if they were a sacrifice given to him. AT: "if they were a wave offering" (See: rc://en/ta/man/translate/figs-simile)