Numbers 18:2-4

New King James Version

² Also bring with you your brethren of the ^(A)tribe of Levi, the tribe of your father, that they may be ^(B)joined with you and serve you while you and your sons are with you before the tabernacle of ^[a]witness. ³ They shall attend to your ^[b]needs and ^(C)all the needs of the tabernacle; ^(D)but they shall not come near the articles of the sanctuary and the altar, ^(E)lest they die—they and you also. ⁴ They shall be joined with you and attend to the needs of the tabernacle of meeting, for all the work of the tabernacle; ^(F)but an outsider shall not come near you.