The LORD said to Moses,
“Bring the tribe of Levi and present them to Aaron the priest to assist him.
References for Numbers 3:6
They are to perform duties for him and for the whole community at the tent of meeting by doing the work of the tabernacle.
References for Numbers 3:7
They are to take care of all the furnishings of the tent of meeting, fulfilling the obligations of the Israelites by doing the work of the tabernacle.