Numbers 8:19

And I have given the Levites; they are given to Aaron and his sons from the midst of the {Israelites} to do the work of the {Israelites} in the tent of the assembly and to make atonement for the {Israelites}, so a plague will not be among the {Israelites} when the {Israelites} come near the sanctuary."

Numbers 1:53

But the Levites will encamp around the tabernacle of the testimony, and there will not be wrath on the community of the {Israelites}; and the Levites will keep the requirements of the tabernacle of the testimony."

Numbers 16:46

And Moses and Aaron said, "Take the censer, and put fire on it from the altar. Place incense [on it], and bring it quickly to the community, and make atonement for them, because wrath went out from the presence of Yahweh, and a plague has begun."

Numbers 3:6-9

"Bring near the tribe of Levi, and {set the tribe} {before Aaron} the priest, and they will minister to him.

Numbers 18:2-6

Moreover, bring your brothers with you, the tribe of Levi the tribe of your father, that they may be joined to you and minister [to] you, you and your sons with you before the tent of testimony.

1 Samuel 6:19

He struck seventy men among the men of Beth Shemesh because they looked into the ark of Yahweh. So the people mourned because Yahweh had struck a great blow among the people.

1 Chronicles 23:28-32

For their station [was] {to assist} the sons of Aaron with the service of the house of Yahweh, over the courtyards, over the chambers, and over the cleansing of all the sanctified objects, and [with] the work of the service of the house of God,

2 Chronicles 26:16-20

But on account of his strength his heart grew proud unto destruction. And he acted unfaithfully against Yahweh his God and went into the temple of Yahweh to offer an incense offering on the altar.

Ezekiel 44:11-14

Then they will be in my sanctuary, [those] serving [in] my sanctuary, [as] sentries at the gates of the temple and [as] [those] serving the temple; they will slaughter the burnt offering and the sacrifice for the people, and they will stand {before them} to serve 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 near the tribe of Levi, and {set the tribe} {before Aaron} the priest, and they will minister to him.
Numbers 18:2
Moreover, bring your brothers with you, the tribe of Levi the tribe of your father, that they may be joined to you and minister [to] you, you and your sons with you before the tent of testimony.
1 Chronicles 23:28
For their station [was] {to assist} the sons of Aaron with the service of the house of Yahweh, over the courtyards, over the chambers, and over the cleansing of all the sanctified objects, and [with] the work of the service of the house of God,
Ezekiel 44:11
Then they will be in my sanctuary, [those] serving [in] my sanctuary, [as] sentries at the gates of the temple and [as] [those] serving the temple; they will slaughter the burnt offering and the sacrifice for the people, and they will stand {before them} to serve them,

That there

Numbers 1:53
But the Levites will encamp around the tabernacle of the testimony, and there will not be wrath on the community of the {Israelites}; and the Levites will keep the requirements of the tabernacle of the testimony."
Numbers 16:46
And Moses and Aaron said, "Take the censer, and put fire on it from the altar. Place incense [on it], and bring it quickly to the community, and make atonement for them, because wrath went out from the presence of Yahweh, and a plague has begun."
Numbers 18:5
You will keep the responsibility of the sanctuary and the responsibility of the altar, and there will no longer be wrath on the {Israelites}.
1 Samuel 6:19
He struck seventy men among the men of Beth Shemesh because they looked into the ark of Yahweh. So the people mourned because Yahweh had struck a great blow among the people.
2 Chronicles 26:16
But on account of his strength his heart grew proud unto destruction. And he acted unfaithfully against Yahweh his God and went into the temple of Yahweh to offer an incense offering on the altar.

General references

Numbers 3:9
You will give the Levites to Aaron and to his descendants; they [are] surely assigned to him from among the {Israelites}.