King James Version
This is it that belongeth unto the Levites: from twenty and five years old and upward they shall go in to wait upon the service of the tabernacle of the congregation:English Standard Version
"This applies to the Levites: from twenty-five years old and upward they shall come to do duty in the service of the tent of meeting.New International Version
"This applies to the Levites: Men twenty-five years old or more shall come to take part in the work at the Tent of Meeting,