from thirty years old and upward until fifty years old shalt thou number them: all that enter in to wait upon the service, to do service in the tent of meeting.
King James Version (KJV) - Numbers 4:23 >From thirty years old and upward until fifty years old shalt thou number them; all that enter in to perform the service, to do the work in the tabernacle of the congregation.
Berean Study Bible (BSB) - Numbers 4:23 >from thirty to fifty years old, counting everyone who comes to serve in the work at the Tent of Meeting.