Numbers 8:19

I have given the Levites as a gift to Aaron and to his sons from among the Israelites, to perform the service of the Israelites at the Tent of Meeting (tabernacle) and to make atonement for them, so that there will be no plague among the Israelites if they should approach the sanctuary.”

Numbers 1:53

But the Levites shall camp around the tabernacle of the Testimony, so that there will be no wrath against the congregation of the Israelites. The Levites shall be in charge of the tabernacle of the Testimony.”

Numbers 16:46

Moses said to Aaron, “Take a censer and put fire in it from the altar and lay incense on it; then bring it quickly to the congregation and make atonement for them, for wrath has gone forth from the Lord; the plague has begun!”

Numbers 3:6-9

“Bring the tribe of Levi near and present them before Aaron the priest, so that they may serve him.

Numbers 18:2-6

But bring with you also your brothers, the tribe of Levi, the tribe of your father (ancestor), so that they may join with you and serve you [as assistants], while you and your sons with you are before the Tent of the Testimony [the Holy Place where only priests may go, and the Most Holy Place which only the high priest may enter].

1 Samuel 6:19

The Lord struck down some of the men of Beth-shemesh because they had looked into the ark of the Lord. He struck down 50,070 men among the people, and the people mourned because the Lord had struck the people with a great slaughter.

1 Chronicles 23:28-32

For their duty is to assist [the priests] the sons of Aaron in the service of the house of the Lord, in [caring for] the courtyards, the chambers, the purifying of all holy things, and any work of the service of the house of God,

2 Chronicles 26:16-20

But when Uzziah became strong, he became so proud [of himself and his accomplishments] that he acted corruptly, and he was unfaithful and sinned against the Lord his God, for he went into the temple of the Lord to burn incense on the altar of incense.

Ezekiel 44:11-14

Yet they shall minister in My sanctuary, having oversight [as guards] at the gates of the temple and ministering in the temple. They shall slaughter the burnt offering and the sacrifice for the people, and they shall stand before them to minister to them.

Treasury of Scripture Knowledge

Summary

And I have given the Levites as a gift to Aaron and to his sons from among the children of Israel, to do the service of the children of Israel in the tabernacle of the congregation, and to make an atonement for the children of Israel: that there be no plague among the children of Israel, when the children of Israel come nigh unto the sanctuary.

General references

Bible References

I have given

Numbers 3:6
“Bring the tribe of Levi near and present them before Aaron the priest, so that they may serve him.
Numbers 18:2
But bring with you also your brothers, the tribe of Levi, the tribe of your father (ancestor), so that they may join with you and serve you [as assistants], while you and your sons with you are before the Tent of the Testimony [the Holy Place where only priests may go, and the Most Holy Place which only the high priest may enter].
1 Chronicles 23:28
For their duty is to assist [the priests] the sons of Aaron in the service of the house of the Lord, in [caring for] the courtyards, the chambers, the purifying of all holy things, and any work of the service of the house of God,
Ezekiel 44:11
Yet they shall minister in My sanctuary, having oversight [as guards] at the gates of the temple and ministering in the temple. They shall slaughter the burnt offering and the sacrifice for the people, and they shall stand before them to minister to them.

That there

Numbers 1:53
But the Levites shall camp around the tabernacle of the Testimony, so that there will be no wrath against the congregation of the Israelites. The Levites shall be in charge of the tabernacle of the Testimony.”
Numbers 16:46
Moses said to Aaron, “Take a censer and put fire in it from the altar and lay incense on it; then bring it quickly to the congregation and make atonement for them, for wrath has gone forth from the Lord; the plague has begun!”
Numbers 18:5
So you shall attend to the duties of the sanctuary and the duties of the altar [of burnt offering and the altar of incense], so that there will no longer be wrath on the Israelites [as with Korah, Dathan, and Abiram].
1 Samuel 6:19
The Lord struck down some of the men of Beth-shemesh because they had looked into the ark of the Lord. He struck down 50,070 men among the people, and the people mourned because the Lord had struck the people with a great slaughter.
2 Chronicles 26:16
But when Uzziah became strong, he became so proud [of himself and his accomplishments] that he acted corruptly, and he was unfaithful and sinned against the Lord his God, for he went into the temple of the Lord to burn incense on the altar of incense.

General references

Numbers 3:9
You shall give the Levites to Aaron and to his sons [as servants and helpers]; they are to be given wholly to him from among the Israelites.