Numbers 9
On the day the tabernacle, the Tent of the Testimony, was set up, the cloud covered it. From evening till morning the cloud above the tabernacle looked like fire. That is how it continued to be; the cloud covered it, and at night it looked like fire. Whenever the cloud lifted from above the Tent, the Israelites set out; wherever the cloud settled, the Israelites encamped. At the LORD's command the Israelites set out, and at his command they encamped. As long as the cloud stayed over the tabernacle, they remained in camp.

Numbers 8
The Lord instructed Moses regarding making the Levites "ceremonially clean" that they would be purified and may be "ready to do the work of the Lord". The Lord said the Levites were to be "set apart from the other Israelites" and they "will be mine" and "are to be given wholly to me.. in place of the firstborn sons of Israel..and I have given the Levites as gifts to Aaron to do the work at the Tent of Meeting to make atonement for them."

Numbers 7 When Moses finished setting up the tabernacle, he anointed it and consecrated it and all its furnishings. He also anointed and consecrated the altar and all its utensils. Then the leaders of Israel, the heads of families who were the tribal leaders in charge of those who were counted, made offerings.

Numbers 6 The Lord said, "If a man or woman wants to make a special vow, a vow of separation to the Lord, ... throughout the period of his separation, he is consecrated to the Lord." Then the Lord instructed Moses and Aaron.. "This is how you are to bless the Israelites.. 'The Lord bless you and keep you; the Lord make his face shine upon you and be gracious to you; the Lord turn his face toward you and give you peace.' So they will put my name on the Israelites, and I will bless them."

Numbers 5, some rules were given to uphold the purity and holiness of God's people in the camp, where God lived among them.

Numbers 4, the Lord divided up the many specific duties of the Levites and assigned them to the different Levite family clans--the Kohathites, Gershonites, Meranites,

Numbers 3, the Levites were called to serve Aaron as assistants, performing the sacred duties in and around the Tabernacle, maintaining all the holy furnishings inside the sacred tent on behalf of all the Israelites. God said, "I have chosen the Levites from among the Israelites as substitutes for all the firstborn sons of the people of Israel.