2 Chronicles 29:33-34

33The animals consecrated as sacrifices were 600 bulls and 3,000 sheep.

34The kohanim, however, were too few to flay all the burnt offerings, so their kinsmen, the Levites, helped them until the work was completed, and until other kohanim had consecrated themselves. For the Levites had been more conscientious to consecrate themselves than the kohanim.