Numbers 18:3

3 They shall keep your charge, and the charge of all the Tent: only they shall not come near to the vessels of the sanctuary and to the altar, that they not die, neither they, nor you.

Numbers 18:3 In-Context

1 The LORD said to Aharon, You and your sons and your fathers' house with you shall bear the iniquity of the sanctuary; and you and your sons with you shall bear the iniquity of your priesthood.
2 Your brothers also, the tribe of Levi, the tribe of your father, bring you near with you, that they may be joined to you, and minister to you: but you and your sons with you shall be before the tent of the testimony.
3 They shall keep your charge, and the charge of all the Tent: only they shall not come near to the vessels of the sanctuary and to the altar, that they not die, neither they, nor you.
4 They shall be joined to you, and keep the charge of the tent of meeting, for all the service of the Tent: and a stranger shall not come near to you.
5 You shall keep the charge of the sanctuary, and the charge of the altar; that there be wrath no more on the children of Yisra'el.
The Hebrew Names Version is in the public domain.