Numbers 8:19

8:19 I have given the Levites as a gift to Aaron and his sons from among the Israelites, to do the work for the Israelites in the tent of meeting, and to make atonement for the Israelites, so there will be no plague among the Israelites when the Israelites come near the sanctuary.”

Numbers 15:25

15:25 And the priest is to make atonement for the whole community of the Israelites, and they will be forgiven, because it was unintentional and they have brought their offering, an offering made by fire to the Lord, and their purification offering before the Lord, for their unintentional offense.

Numbers 16:46-47

16:46 Then Moses said to Aaron, “Take the censer, put burning coals from the altar in it, place incense on it, and go quickly into the assembly and make atonement for them, for wrath has gone out from the Lord – the plague has begun!” 16:47 So Aaron did as Moses commanded and ran into the middle of the assembly, where the plague was just beginning among the people. So he placed incense on the coals and made atonement for the people.

Numbers 31:50

31:50 So we have brought as an offering for the Lord what each man found: gold ornaments, armlets, bracelets, signet rings, earrings, and necklaces, to make atonement for ourselves before the Lord.”

Numbers 35:33

35:33 “You must not pollute the land where you live, for blood defiles the land, and the land cannot be cleansed of the blood that is shed there, except by the blood of the person who shed it.