i.e. Upon the difficult and cumbersome part of their work.
Related Commentaries of Numbers 8:25
Numbers 8:25
25 And from the age of fifty years they shall ceased waiting upon the service thereof, and shall serve no more:
i.e. Upon the difficult and cumbersome part of their work.
25 And from the age of fifty years they shall ceased waiting upon the service thereof, and shall serve no more: