Numbers Chapter 8, Verse 11

11: 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.- edit KJV text
11: And Aaron shall offer the Levites, as a gift in the sight of the Lord from the children of Israel, that they may serve in his ministry.— edit Douay text
11: And Aaron shall separate the Levites for a gift before the Lord from the children of Israel: and they shall be prepared to perform the works of the Lord.— edit LXX text