KJV: And Aaron shall offer the Levites before the LORD for an offering of the children of Israel, that they may execute the service of the LORD.
NASB: "Aaron then shall present the Levites before the LORD as a wave offering from the sons of Israel, that they may qualify to perform the service of the LORD.
KJV: And I have given the Levites as a gift to Aaron and to his sons from among the children of Israel, to do the service of the children of Israel in the tabernacle of the congregation, and to make an atonement for the children of Israel: that there be no plague among the children of Israel, when the children of Israel come nigh unto the sanctuary.
NASB: "I have given the Levites as a gift to Aaron and to his sons from among the sons of Israel, to perform the service of the sons of Israel at the tent of meeting and to make atonement on behalf of the sons of Israel, so that there will be no plague among the sons of Israel by their coming near to the sanctuary."
KJV: And Moses, and Aaron, and all the congregation of the children of Israel, did to the Levites according unto all that the LORD commanded Moses concerning the Levites, so did the children of Israel unto them.
NASB: Thus did Moses and Aaron and all the congregation of the sons of Israel to the Levites; according to all that the LORD had commanded Moses concerning the Levites, so the sons of Israel did to them.
KJV: And the Levites were purified, and they washed their clothes; and Aaron offered them as an offering before the LORD; and Aaron made an atonement for them to cleanse them.
NASB: The Levites, too, purified themselves from sin and washed their clothes; and Aaron presented them as a wave offering before the LORD. Aaron also made atonement for them to cleanse them.
KJV: And after that went the Levites in to do their service in the tabernacle of the congregation before Aaron, and before his sons: as the LORD had commanded Moses concerning the Levites, so did they unto them.
NASB: Then after that the Levites went in to perform their service in the tent of meeting before Aaron and before his sons; just as the LORD had commanded Moses concerning the Levites, so they did to them.
KJV: And there were certain men, who were defiled by the dead body of a man, that they could not keep the passover on that day: and they came before Moses and before Aaron on that day:
NASB: But there were some men who were unclean because of the dead person, so that they could not observe Passover on that day; so they came before Moses and Aaron on that day.