Leviticus 10:6 Then Moses said to Aaron and to his sons Eleazar and Ithamar, "Do not uncover your heads nor tear your clothes, so that you will not die and that He will not become wrathful against all the congregation. But your kinsmen, the whole house of Israel, shall bewail the burning which the LORD has brought about.

Numbers 3:23 The families of the Gershonites were to camp behind the tabernacle westward,

Numbers 3:29 The families of the sons of Kohath were to camp on the southward side of the tabernacle,

Numbers 8:24 "This is what applies to the Levites: from twenty-five years old and upward they shall enter to perform service in the work of the tent of meeting.

Numbers 16:46 Moses said to Aaron, "Take your censer and put in it fire 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 18:2 "But bring with you also your brothers, the tribe of Levi, the tribe of your father, that they may be joined with you and serve you, while you and your sons with you are before the tent of the testimony.

Numbers 18:5 "So you shall attend to the obligations of the sanctuary and the obligations of the altar, so that there will no longer be wrath on the sons of Israel.

1 Chronicles 23:32 Thus they are to keep charge of the tent of meeting, and charge of the holy place, and charge of the sons of Aaron their relatives, for the service of the house of the LORD. (NASB ©1995)