Numbers 1:50
But appoint them over the tabernacle of the testimony, and all the vessels thereof, and whatsoever pertaineth to the ceremonies. They shall carry the tabernacle and all the furniture thereof: and they shall minister, and shall encamp round about the tabernacle.

Numbers 3:5
And the Lord spoke to Moses, saying:

Numbers 8:6
Take the Levites out of the midst of the children of Israel, and thou shalt purify them,

Numbers 16:9
Is it a small thing unto you, that the God of Israel hath spared you from all the people, and joined you to himself, that you should serve him in the service of the tabernacle, and should stand before the congregation of the people, and should minister to him?

Numbers 18:1
And the Lord said to Aaron: Thou, and thy sons, and thy father's house with thee shall bear the iniquity of the sanctuary: and thou and thy sons with thee shall bear the sins of your priesthood.

Deuteronomy 10:8
At that time he separated the tribe of Levi, to carry the ark of the covenant of the Lord, and to stand before him in the ministry, and to bless in his name until this present day.

1 Chronicles 23:32
And let them keep the observances of the tabernacle of the covenant, and the ceremonies of the sanctuary, and the charge of the sons of Aaron their brethren, that they may minister in the house of the Lord.

2 Chronicles 29:11
My sons, be not negligent: the Lord hath chosen you to stand before him, and to minister to him, and to worship him, and to burn incense to him.

Ezra 6:18
And they set the priests in their divisions, and the Levites in their courses over the works of God in Jerusalem, as it is written in the book of Moses.