GOD'S WORD® Translation
But when they're 50 years old, they must retire from active service and not work anymore.

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

Berean Study Bible
But at the age of fifty, they must retire from performing the work and no longer serve.

Douay-Rheims Bible
And when they shall have accomplished the fiftieth year of their age, they shall cease to serve:

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

King James Bible
And from the age of fifty years they shall cease waiting upon the service thereof, and shall serve no more:

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

Young's Literal Translation
and from a son of fifty years he doth return from the host of the service, and doth not serve any more,

Numbers 8:25 Additional Translations ...