Numbers 8:15

And after that shall the Levites go in to do the service of the tent of meeting: and thou shalt cleanse them, and offer them for a wave-offering.

Numbers 8:11

and Aaron shall offer the Levites before Jehovah for a wave-offering, on the behalf of the children of Israel, that it may be theirs to do the service of Jehovah.

Numbers 8:13

And thou shalt set the Levites before Aaron, and before his sons, and offer them for a wave-offering unto Jehovah.

Exodus 29:24

And thou shalt put the whole upon the hands of Aaron, and upon the hands of his sons, and shalt wave them for a wave-offering before Jehovah.

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 womb among the children of Israel; and the Levites shall be mine:

Numbers 3:23-37

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

Numbers 4:3-32

from thirty years old and upward even until fifty years old, all that enter upon the service, to do the work in the tent of meeting.

1 Chronicles 23:1-32

Now David was old and full of days; and he made Solomon his son king over Israel.

1 Chronicles 25:1-26

Moreover David and the captains of the host set apart for the service certain 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 them that did the work 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 Jehovah for a wave-offering, on the behalf of the children of Israel, that it may be theirs to do the service of Jehovah.
Numbers 3:23
The families of the Gershonites shall encamp behind the tabernacle westward.
Numbers 4:3
from thirty years old and upward even until fifty years old, all that enter upon the service, to do the work in the tent of meeting.

And offer

Numbers 8:11
and Aaron shall offer the Levites before Jehovah for a wave-offering, on the behalf of the children of Israel, that it may be theirs to do the service of Jehovah.
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 womb among the children of Israel; and the Levites shall be mine:

American Standard Version Public Domain