Count men aged thirty to fifty—all who are entitled to do the work of serving in the Tent of Meeting.
Register the descendants of Merari, according to their family and father's line.
This is how they will serve in handling the Tent of Meeting: they are to carry the frames of the Tabernacle with its crossbars, posts, and stands,
“This rule applies to the Levites. Those twenty-five or older shall serve at the Tent of Meeting.
A soldier on active duty doesn't get caught up in the business of everyday life. He wants to please the one who enlisted him.