King James Version
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.English Standard Version
and Aaron shall offer the Levites before the LORD as a wave offering from the people of Israel, that they may do the service of the LORD.New International Version
Aaron is to present the Levites before the LORD as a wave offering from the Israelites, so that they may be ready to do the work of the LORD.