Matthew Poole and continuators on Numbers 4:44

44 Even those that were numbred of them after their families, were three thousand and two hundred ▪

Here appears the wisdom of Divine providence, that whereas in the Kohathites and Gershonites, whose burdens were fewer and easier, there were but about a third part of them which were fit for service, the Merarites, whose burdens were more and heavier, had above one half of them fit for this work.