Numbers 18:4-6 Contemporary English Version (CEV)
4 No one else is allowed to take care of the sacred tent or to do anything connected with it. 5 Follow these instructions, so I won’t become angry and punish the Israelites ever again.
6 I alone chose the Levites from all the other tribes to belong to me, and I have given them to you as your helpers.
Numbers 18:4-6 New International Version (NIV)
4 They are to join you and be responsible for the care of the tent of meeting—all the work at the tent—and no one else may come near where you are.
5 “You are to be responsible for the care of the sanctuary and the altar, so that my wrath will not fall on the Israelites again. 6 I myself have selected your fellow Levites from among the Israelites as a gift to you, dedicated to the Lord to do the work at the tent of meeting.