Numbers 18:3

And they shall keep your charges, and the charges of the tabernacle; only they shall not approach the holy vessels and the altar, so both they and you shall not die.

And they shall keep thy charge, and the charge of all the tabernacle: only they shall not come nigh the vessels of the sanctuary and the altar, that neither they, nor ye also, die.

They shall keep your commands and the duty of the whole 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.