Numbers 1:53; Numbers 16:46; Numbers 18:5

Numbers 1:53

53 "But the Levites shall camp around the tabernacle of the testimony, so that there will be no wrath on the congregation of the sons of Israel. So the Levites shall keep charge of the tabernacle of the testimony."

Numbers 16:46

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 18:5

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.