Numbers 8:25

And from the age of fifty years they shall cease waiting upon the service thereof, and shall serve no more:
— Numbers 8:25, King James Version

In other translations

World English Bible (WEB)

and from the age of fifty years they shall cease waiting on the work, and shall serve no more,

American Standard Version (ASV)

and from the age of fifty years they shall cease waiting upon the work, and shall serve no more,

Young's Literal Translation (YLT)

and from a son of fifty years he doth return from the host of the service, and doth not serve any more,