Numbers 8:15

And after that shall the Levites go in to perform the service of the tabernacle of the congregation: and thou shalt cleanse them, and offer them for an offering.

Numbers 8:11

And Aaron shall offer the Levites before the LORD for an offering of the children of Israel, that they may execute the service of the LORD.

Numbers 8:13

And thou shalt set the Levites before Aaron, and before his sons, and offer them for an offering to the LORD.

Exodus 29:24

And thou shalt put all in the hands of Aaron, and in the hands of his sons; and shalt wave them for a wave-offering before the LORD.

Numbers 3:12

And I, behold, I have taken the Levites from among the children of Israel, instead of all the first-born that openeth the matrix among the children of Israel: therefore the Levites shall be mine;

Numbers 3:23-37

The families of the Gershonites shall pitch behind the tabernacle westward.

Numbers 4:3-32

From thirty years old and upward, even until fifty years old, all that enter into the host, to do the work in the tabernacle of the congregation.

1 Chronicles 23:1-32

So when David was old and full of days, he made Solomon his son king over Israel.

1 Chronicles 25:1-26

Moreover David and the captains of the host separated to the service of the sons of Asaph, and of Heman, and of Jeduthun, who should prophesy with harps, with psalteries, and with cymbals: and the number of the workmen according to their service was:

Treasury of Scripture Knowledge

Summary

And after that shall the Levites go in to do the service of the tabernacle of the congregation: and thou shalt cleanse them, and offer them for an offering.

Bible References

Go in

Numbers 8:11
And Aaron shall offer the Levites before the LORD for an offering of the children of Israel, that they may execute the service of the LORD.
Numbers 3:23
The families of the Gershonites shall pitch behind the tabernacle westward.
Numbers 4:3
From thirty years old and upward, even until fifty years old, all that enter into the host, to do the work in the tabernacle of the congregation.

And offer

Numbers 8:11
And Aaron shall offer the Levites before the LORD for an offering of the children of Israel, that they may execute the service of the LORD.
Numbers 3:12
And I, behold, I have taken the Levites from among the children of Israel, instead of all the first-born that openeth the matrix among the children of Israel: therefore the Levites shall be mine;